Skill: write-like-james @ cca3af6 · the build: course-build → write-lesson, write-mcqs, write-video-script, write-intro, write-summary @ cca3af6; the non-author review and fix pass: review-lesson (Role B + Role C) → review-questions, review-figures, review-accuracy, review-physics @ cca3af6

Topic 20 "Why the Sun crosses our sky" — your read (8 October 2026)

Skim first

The lessons in teaching order, each with its one rule sentence; then the intro script; then the question types. The review page follows.

The lessons and their rules

Lesson	Atom	Rule sentence
L01 Day on one side of Earth, night on the other	SPA5-004	Daytime on the side of Earth facing the Sun. Night on the side facing away from the Sun. The Sun never stops shining.
L02 Why scientists use a model	SR5-030	A thing that stands in for the real thing: a model. Scientists use a model for something too big, too small or too slow to watch. A model shows the part you are studying.
L03 Show day and night with a globe and a lamp	SPA5-006	Shine a lamp on a globe; mark your town with a sticker. Turn the globe slowly from west to east. One full turn stands for one day.
L04 Why the Sun seems to cross our sky	SPA5-005	The Sun seems to cross our sky because Earth turns. Turning to face the Sun: sunrise in the east. Turning away from the Sun: sunset in the west.
L05 Why shadows change through the day	SPA5-007	Earth turns, so the Sun's place in the sky changes. So a shadow's direction and length change too. The Sun low: a long shadow. The Sun high: a short shadow.
L06 Where the globe model gets it wrong	SR5-031	Every model is different from the real thing in some way. The globe is tiny and smooth, and a hand turns it. The lamp is small and close.

The intro script (117 words, about 58 s)

Here's Tamsin at the bus stop early one morning. The Sun is just up over the houses in the east, and her shadow stretches long across the sidewalk. That evening she walks home, and the Sun goes down behind the park on the other side of town. Her shadow is long again, but it points the other way. Tomorrow the Sun will do the same thing. So why does the Sun cross our sky every day? To find out, we will look at day and night on the whole Earth, a globe and a lamp, and the shadows that change through the day. Okay, so are you ready to find out why the Sun crosses our sky?

The question types (from `TYPES_G5T20.md`)

Type 1 (easy · MCQ, the side set · 004): which side of Earth a place is on at midday / midnight / breakfast — the side facing the Sun / facing away / the top half / the bottom half
Type 2 (easy · MCQ, the night-reason set · 004): why it is night, or which sentence about the Sun at night is true — faces away from the Sun / the Sun has stopped shining / clouds / the Moon
Type 3 (easy, medium · MCQ, drawn Earth · 004): what it is at the drawn dot now; what it will be in twelve hours — daytime / night / sunrise / midday …
Type 4 (easy · MCQ, the why-a-model set · 030): why a scientist uses a thing that stands in — too big / too small / too slow / too far away
Type 5 (easy · MCQ · 030): what we call the stand-in; which of four things is a model — a model / a sample / a measurement / a tool; four things
Type 6 (easy · MCQ, the stands-in set · 006): what the flashlight / the ball stands in for — the Sun / Earth / your town / the Moon
Type 7 (easy · MCQ, the time set (ordered) · 006): how much time the sticker's trip round and back to the lamp stands for — one hour / one day / one week / one year
Type 8 (medium · MCQ · 004, 030, 006, 005): the rule applied to a fresh case: two places at once; a useful storm program; map or photo; what to do for night; half a turn; a trip round the lamp; sunset; Earth turning twice as fast; midday here, midnight on the far side — four single answers
Type 9 (easy, medium · MCQ, the really-moving set · 005): which thing is really moving — Earth, turning around / the Sun, traveling around Earth / the sky / Earth, traveling around the Sun
Type 10 (easy, medium · MCQ, the direction set · 005): the direction the Sun comes up / goes down — east / west / north / south
Type 11 (medium · MCQ, drawn globe · 006): what is happening at the sticker on the edge, the arrow drawn — morning beginning / night beginning / midnight / midday
Type 12 (easy · MCQ, the midday-shadow set (ordered) · 007): how long the midday shadow is compared with the day — shortest / a little shorter / the same / longest
Type 13 (medium · MCQ, drawn post · 007): which side the shadow is on and how long; what is true of the shadow under a high Sun — four side-and-length pairs; four statements
Type 14 (medium · MCQ · 007): which way the afternoon shadow points; the correct reason the midday shadow is shorter — four directions; four reasons
Type 15 (easy, medium · MCQ, the gets-wrong set · 031): which thing the model gets wrong — the size of Earth / the shape / that Earth turns / where the land and sea are (and four for a toy car, a toy Sun-and-Earth set)
Type 16 (medium · MCQ · 031): what the real thing has that the smooth model leaves out; which sentence about a flat map is true — four single answers
Type 17 (hard · typed · 030): the word for a thing that stands in for the real thing — model (article and child spellings)
Type 18 (hard · typed · 006): what the lamp stands in for; how much time one full turn stands for — the Sun; one day (24 hours, a day…)
Type 19 (hard · MCQ, claim judged by reason · 005): Simon is wrong (the Sun travels round Earth once a day): the correct reason — four single-statement reasons
Type 20 (hard · typed · 005): the name of the thing really moving — Earth (article and child spellings)
Type 21 (hard · typed · 005): the direction the Sun seems to come up / go down, from the turning — east; west
Type 22 (hard · MCQ, claim judged by reason · 007): Tamsin is wrong (the Sun moves closer): the correct reason — four single-statement reasons
Type 23 (hard · MCQ, two ideas chained · 007): which sentence explains the whole day's pattern — four single answers
Type 24 (medium · MCQ · 007): what time of day the shortest shadow is — around midday / early morning / late afternoon / after sunset
Type 25 (hard · typed · 007): the direction a morning / afternoon shadow points — west; east
Type 26 (hard · MCQ, claim judged by reason · 031): Soren is wrong (Earth stops at night like the globe): the correct reason — four single-statement reasons
Type 27 (medium · MCQ · 031): which thing the lamp-and-globe model gets wrong (the lamp's distance) — how far away the Sun is / the shape of Earth / where the land and sea are / that Earth turns all the way around
Type 28 (hard · typed · 004): the name of the thing that turns the town away from the Sun — Earth

Six lesson pages for six atoms, in Miss Thornton's class with Simon, Soren and Tamsin.

Simon's grandma in India calls at Texas lunchtime and her window is black, so L01 draws Earth from above the North Pole: the half facing the Sun has day, the half facing away has night, twelve hours later the two places have swapped, and the Sun never stops shining.

Miss Thornton shines a lamp on the globe because nobody can step back and watch Earth turn, so L02 gives three things too big, too small or too slow to watch and the thing that stands in for each, then coins "model" — the one term the topic owns — and shows with a flat map against a photo that a model shows the part you are studying.

Tamsin turns the globe from west to east in L03 and the sticker's town goes midday, evening, midnight, morning; one full turn stands for one day, and the globe spins on its stand and never travels around the lamp.

Soren says the Sun travels around Earth once a day because you can watch it cross the sky, so L04 puts him on the merry-go-round, turns the town past a still Sun, and answers him: the Sun seems to cross our sky because Earth turns.

The capstone, L05, chains it to the flagpole: Earth turns, so the Sun's place in the sky changes, so the shadow's direction and length change; the Sun low gives a long shadow, the Sun high a short one, drawn from the Sun's angle.

Soren then holds the smooth little globe in L06 and the class asks of seven features "Does the model get this right?" — three right, four wrong — so every model is different from the real thing in some way.

Grade 4's spin sentences and Grade 3's light sentences are reused word for word; the seasons, the tilt, the Moon and "orbit" are never said.

The non-author review and fix pass is applied (four must-fix, twenty-one worth fixing, every key letter unchanged but one whose options changed); two cold readers agreed every key but one (PP-57, now rewritten), and the adjudication is applied; pictures are placeholders; the batch is built and not sent (your Earth and Space sample).

The questions the author put to you

none

Questions for James

none. The author's six judgement calls were checked and stand ("model" coined in L02; the typed term last in practice and bank; the three shortened rule lines; L04's quoted opener; L06 as a kind category; the day–night place pairs). Nothing left open would change what a student learns.

Applied without asking

8 Oct 2026, the non-author pass (James's 2 Oct rule: text is cheap, go with the improvement): a quiz item that had a spacecraft photograph "the whole Earth" and asked how much was lit (a photo from the Sun's side is fully lit) now asks the plain fact; a bank item whose options bundled "The map, because…" now states the verdict and offers four reasons (your 28 September ban, applied as written); a bank item that opened "In the same class" is its own scene; a bank distractor that would in fact have brought night to the sticker's town (moving the lamp to the other side) is now a second lamp. Two figure faults fixed (leaders crossing the globe in L01's strip; a chip on a light line in L03's drawings); L02's rule card now says the coining sentence the way the lesson does; L02's video names the photo its map beats; L03 says "model" once; the L02 term item sits last in its quiz; four bank items that were quiz or practice items with a noun changed are fresh; "the middle of the night" in India at Texas lunchtime is now "late at night". Every key letter is unchanged except L04-q5 (new option set) and the moved L02 term item.

The lessons

Everything to rule on is on the Needs James page → the lessons, the open questions and the question types, each a card with buttons

Also on the site

Topic intro and poll · summary and three questions · mixed practice · the PP100 bank · the type sheet

After you answer

Nothing waits on you here except the scripts: this topic is in your Earth and Space sample, so the eight-video batch (built, checked, not sent) goes on your word. The seven adjudication changes get their mini re-read from blind/2026-10-08-adjudicated/CHANGED_IDS.md; the picture pass starts on the seven placeholders after your read.

What the reviews found, and what changed

The non-author review and fix pass (8 October): four must-fix, twenty-one worth fixing, seven simplifications left, the author's calls upheld

Skill: review-lesson (Role B, the guidance reviewer, with Role C's fix pass) → review-questions, review-figures, review-accuracy, review-physics (text and figures) @ cca3af6

Grade 5 Topic 20 — Why the Sun crosses our sky — non-author review and fix pass (8 October 2026)

The short version

The topic teaches what it says it teaches, and nothing an astronomer would strike once four things are changed. Day is on the half of Earth facing the Sun and night on the half facing away; Earth turns from west to east, counterclockwise seen from above the North Pole, and every drawing turns it that way; the Sun stays where it is while the town turns past it; the post's shadow is computed from the Sun's angle and falls the right way at the right length every time; the seasons, the tilt, the Moon and "orbit" are never said; Grade 4's spin sentences and Grade 3's light sentences are reused word for word; "model" is coined once, in the frame, in L02, and said in every later lesson once L03 gained its one mention.

Four things had to change. A quiz item said a spacecraft photographs "the whole Earth" and asked how much of it is lit — a photo from the Sun's side shows a fully lit disc, so the premise is false; the item now asks the plain fact (at any one moment, how much of Earth is lit). A bank item offered "The map, because it shows the roads…" — a verdict bundled with its reason, which the 28 September ban forbids and the author's own record claimed to have applied; the stem now states the verdict and the options are four reasons. A bank item opened "In the same class…" and so could not be drawn on its own; it is now its own scene. And a bank distractor, "move the lamp to the other side of the room", would in fact bring night to the sticker's town — a second right answer; it is now a second lamp. Twenty-one smaller things were worth fixing and are fixed: two figure faults (leaders crossing the globe; a chip sitting on a light line), the L02 rule card inverting the coining sentence, the L02 video's "the better model" with nothing to be better than, the term item not last in its quiz, four bank items that were quiz or practice items with a noun changed (the record's "fresh" claim re-performed and found false four times), a silly distractor, an appended-clause key, an accept list that took "sunlight" for the Sun, and "the middle of the night" for a grandma in India at Texas lunchtime (it is half past ten or eleven at night there).

Every key letter is unchanged except L04-q5, whose option set changed (key index 0 → 1), and the L02 term item, which moved from fourth to last. Nothing here needs James.

The author's calls, judged

Call	Verdict	Why
"model" coined in L02, before L03 uses the thing	Not an error	TEKS 5.2A names models, so the word is required; L02 coins it in the frame after three cases; L03 is the model in use. L03 never said the word — fixed (W8), one caption and one script beat.
The typed "model" placed last in the practice set and in the bank, not in L02's quiz	Not an error	The vault's S26 reads a grade 3-5 topic as one page; L02's recognition item plus PR-15 typed last and two hard typed bank items cover recognition before recall. The recognition item itself was not last in L02's quiz while six stems below it printed the word — fixed (W6).
Three rule lines shortened for the scripts (L03, L05, L06)	Not an error	The lexicon, the rule step, the rule card and the script carry one sentence each; the dropped clauses stay as idea lines. The one card that did NOT match its line was L02's, which inverted the coining frame — fixed (W3).
L04 opens on Soren's quoted claim	Not an error	Register SPA5 SD-1 belief 1 (pre-existing), the lesson's whole point; the verdict recaps the claim and contradicts it ("So, when Soren said …, he was not right."). The other five openers are the narrator over a scene.
L06 as a KIND category (the feature compared is the case)	Not an error	Seven features of one model, the frame asked before every verdict, both crossings present, S118 silent. The register's belief 2 is met in Soren's case after the run.
The day–night place pairs	Not an error	Texas lunch (12:00 CDT) is 22:30 in India; Ohio school time is 1–2 a.m. in Sydney; Florida school time is 10 p.m. in Thailand; Spain midday is 11 p.m. in New Zealand; Chile, Peru, Japan, Kenya, Mexico are places only. One wording fixed: "the middle of the night" in India → "late at night" (W20).
Articles 300 / 384 / 345 / 370 / 307 / 373	Simplification-leave	One line each: L02 — every section feeds an item (three why-a-model cases → q1–q3, the coining → the term items, the map against the photo → q4 and PP-25), with a figure or subtitle every three idea lines. L03 — a routine of five steps plus "the globe stays on its stand", which L03-q6 and PP-29 lean on. L04 — three views of one fact (the merry-go-round, from space, from the ground) and the verdict; the transfer items need the merry-go-round. L05 — 307. L06 — the seven-case run IS the lesson; the table after it is the only figure the run needs. Cutting any section would orphan an item.

Findings

Verdicts: Must-fix · Worth fixing · Simplification-leave · Not an error. Every Must-fix and Worth-fixing row is applied.

#	Part / location	Check	The fault	Verdict	The rewrite (applied)
M1	L01 quiz q9	review-accuracy step 1; review-physics Part 1 (a claim true at the course's level)	"A spacecraft far above Earth takes a picture of the whole Earth. How much of Earth is lit by the Sun in the picture?" — no photograph shows the whole Earth, and a photograph from the Sun's side shows a fully lit disc (every "Blue Marble" does). An astronomer strikes the premise; a strong student answers "all of it".	Must-fix	"At any one moment, how much of the whole Earth is lit by the Sun?" — all of it / about half of it / none of it; why: "…At every moment, one half faces the Sun. So about half of Earth is lit." Key index unchanged.
M2	PP-25 (type 8, the map or the photo)	review-questions 49 (an option never bundles a verdict with its reason; bank tier banned unless the record names a clean exception — the record says none)	"The map, because it shows the roads and leaves the rest out." / "The photo, because it shows every house and tree." …	Must-fix	Stem states the verdict: "A flat paper map and a photo show the same town, and for finding the way to the library the map is the better model. What is the correct reason?" — It shows only the roads. / It shows every house and tree. / It is bigger than the photo. / It is in color. Key index unchanged; key-tell check 0.
M3	PP-15 (type 6, the soccer ball)	review-questions 71 (an item stands alone); a bank has no order	"In the same class, what does the soccer ball stand in for?" leaned on PP-14.	Must-fix	"A girl in New Mexico shines a flashlight on an orange to show day and night. What does the orange stand in for?" — the stands-in set; why names the round thing that is turned. Key index unchanged.
M4	PP-27 (type 8, Maryland)	review-questions 4 and 28 (a second defensible option; a real object brings its own properties)	Distractor "move the lamp to the other side of the room" — a lamp moved to the far side lights the far half, so the sticker's town DOES go dark.	Must-fix	"shine a second lamp on the other side of the globe" (lights both halves; no night anywhere). Key index unchanged.
W1	Figure `earth_two_strip` (L01)	review-figures 3 (a pointer enters from empty space and crosses nothing)	In the "12 HOURS LATER" disc the two leaders crossed the whole globe and each other to reach the swapped dots.	Worth fixing	The left dot's chip sits up-left and the right dot's down-right in both discs; re-rendered and read on the L01 page.
W2	Figures `lamp_globe_headache`, `lamp_globe_midday`, `lamp_globe_anim` (L03)	review-figures 17 (no overlap)	The chip THE LAMP sat on the lowest line of light.	Worth fixing	Chip moved below the lowest line (cy + 76); the three renders re-opened.
W3	Figure `rule_l02` and the summary strip `rules_six`	review-questions 83; `10 Rules/A definition keeps one form`	The card read "A model is an object, a drawing…" while the lexicon, the rule step and the script coin it "An object, a drawing … is called a model."	Worth fixing	The card carries the lexicon sentence in two lines, then the scientists line; `rules_six` follows.
W4	L02 script, beat 5	Root cause 6 (say the specific thing — "better than what?"); the video stands alone	"A flat map shows only the roads, so it is the better model for finding your way" — the video never showed the photo it beats, so a video-only student meets q4 (Simon's every-house-and-tree model) with no comparison.	Worth fixing	"A town photo shows every roof and tree. A flat map shows only the roads, so the map is the better model for finding your way: it shows the part you need." Screen cue shows `town_photo` then `map_card`. To hold 150 words: beat 1 opens "Miss Thornton's class wants…", beat 2 ends "stands in", beat 3 "Water's tiny pieces…", beat 6 "use a model for something…". Script 150.
W5	L02 quiz q1, fb on "too slow"	review-accuracy step 4 (the course against itself)	"Earth spins once a day, which is easy to watch" — the headache two lines above says nobody can step back and watch Earth turn.	Worth fixing	"Earth spins once a day, so the spin is not slow. Earth is too big to watch all at once."
W6	L02 quiz, the term item (was q4)	review-questions 41 (term-recall items sit last); the quiz page shows all ten items	Six stems and option sets below q4 printed "model" (q5 "the best model", q6 "Is the plastic heart a model?", …).	Worth fixing	The plastic-skeleton item is now q10; q5–q10 become q4–q9. Three-option key string 0 1 2 0 1 2 2 → 0 1 2 1 2 2 0 (no run of four alike; written out, not predicted); two-option B A A unchanged.
W7	PR-6 stem	review-questions 41 / 17 (a stem prints the term the next item asks for)	"Why does she use a computer program as a model?" sat directly above PR-7 "What is the clay volcano? — a model".	Worth fixing	"Why does she use a computer program instead of watching the canyon?" (L02-q2's form).
W8	L03 article and script	Brief item 6 (a coined term is said again in later lessons); the record's "model in L03" row names a line that does not contain the word	L03 never said "model" — the one lesson between the coining and L04.	Worth fixing	Caption: "The five steps of the model, and what each one stands for."; script beat 2 opens "In this model, the lamp stands in for the Sun…"; beat 3 "as Earth turns" to stay at 150.
W9	L04 quiz q5 (Kansas midday)	review-questions 74 (a distractor no child picks); design-check-sequence (the three states the lesson taught)	"toward the Moon" was the third option.	Worth fixing	"It is midday in Kansas. What is Kansas doing at that moment?" — turning to face the Sun / facing the Sun straight on / turning away from the Sun; fb for each names its time of day. Key index 0 → 1; L04 three-option string 0 0 2 0 2 2 → 0 0 2 1 2 2.
W10	L06 quiz q9 (the Colorado map)	review-questions 15 / 47 (the key alone carries an appended clause)	Key "The map gets the land wrong: it is not flat and tiny." beside two one-clause distractors.	Worth fixing	Key "The map gets the size of Colorado wrong."; fb and why say hundreds of miles across against a tiny flat paper. Key index unchanged.
W11	PP-17 (type 9)	review-questions 50 (a record's claimed check is re-performed); the bank comment says "no … Montana … of the practice set"	PP-17 and PR-10 both sat in Montana.	Worth fixing	Wyoming.
W12	PP-38 (type 15)	review-questions 26 / 43 (a bank item is a fresh instance, not a quiz item renamed); the bank comment says "no … two-circle drawing"	"A drawing shows the Sun as a small circle and Earth as a circle the same size" IS L06-q8's two-circle drawing, asked for a different feature.	Worth fixing	"A toy set has a Sun ball and an Earth ball of the same size. Which thing does the toy set get wrong?" — the Sun's size next to Earth's / that the Sun is shaped like a ball / that Earth is shaped like a ball / that there is one Sun and one Earth (the old "that the Sun gives out light" would be a second key on a toy).
W13	PP-42 (type 8)	review-questions 26; review-accuracy (the same false premise as M1); a why that says "in the picture" with no picture	"An astronaut far above Earth looks down at the whole Earth. How much of Earth is lit?" — L01-q9 renamed, and the why ended "lit in the picture".	Worth fixing	"It is midday in a town in Tennessee. On the far side of Earth from Tennessee, what is it at that same moment?" — midday there too / midnight / sunrise / sunset; why from the rule and "faces straight away". Medium, SPA5-004, type 8.
W14	PP-16 (type 7) and PP-46 (type 18)	review-questions 26 / 43	"turns a globe once all the way around beside a lamp" was L03-q5's and PR-9's sentence with the name changed, twice (MCQ and typed).	Worth fixing	PP-16: "…turns a globe beside a lamp until its sticker goes from facing the lamp, through the dark half, and back to facing the lamp. How much time does that turn stand for?"; PP-46: "…until the sticker on it comes back to where it started. Type how much time that turn stands for." Both whys say why that is one full turn.
W15	PP-12 (type 5)	review-questions 26 (the summary's "A toy boat stands in for a real ship while students study how a ship floats" is the same sentence)	"A toy train stands in for a real train while students study how trains stay on their rails."	Worth fixing	"Students want to find out how trains stay on their rails, so they run a toy train around a track. What do we call the toy train here?"
W16	PP-13 (type 5)	review-questions 4 (a second defensible option)	"a photo of a scientist climbing a volcano" — L02 itself calls the picture of the town a (worse) model, so a photo can be argued to be a model.	Worth fixing	"a bucket of ash collected from the volcano" (a real thing, not a stand-in).
W17	PP-45 (type 18, typed "the Sun")	review-questions 53 / 40 (an accept list takes only taught synonyms; its own wrong-answer line refused "light")	Accept list took "the sun's light" and "sunlight" while the wrong-answer line for "light" said the lamp stands in for the Sun.	Worth fixing	Accept: the sun / sun / our sun; a wrong-answer line for "sunlight" ("The lamp's light stands in for sunlight. The lamp itself stands in for the Sun.").
W18	PP-36 (type 14)	B4 (distractors and data name only what the student has met); review-accuracy (a real place must survive the claim)	"a lamppost's shadow in Minnesota points a little west of north" — north is never taught here, and the real 10 a.m. shadow points north-west.	Worth fixing	"At nine in the morning, a lamppost in Minnesota has a long shadow. By four in the afternoon, which way does its shadow point?" Options and key unchanged.
W19	PR-8 (the Pennsylvania boy)	review-questions 26 (mixed practice is not a lesson check renamed)	"He wants to show the town going from day into night. What should he do?" with L03-q4's three options and a new name.	Worth fixing	"…The sticker is on the dark half. What should he do to bring morning back to the town?" — switch the lamp off and on again / keep turning the globe slowly on its stand / hold the globe still and wait (a carried globe was rejected as a distractor: carried to the lamp's far side it WOULD light the sticker). Key index unchanged.
W20	L01 headache, idea line and script beat 1	review-accuracy step 11 (a real place survives the claim)	"the middle of the night in India" at Texas lunchtime — 22:30 to 23:30 in India.	Worth fixing	"late at night in India" / "it's late at night there".
W21	Topic blurb	Root cause 6; the lesson's own answer is that nothing carries the Sun	"So what carries the Sun across our sky every day…" presupposes a carrier.	Worth fixing	"So why does the Sun cross our sky every day, and why does a shadow change from morning to evening?" (the intro script's own words).
S1	`pole_shadow_midday`, `q_pole_sun_high`, `pp_pole_sun_high`	review-physics Part 2 (geometry)	The midday Sun is drawn high and a little to the east of overhead; in truth the midday Sun in the US is high and to the SOUTH, which an east–west side view cannot show, and the shadow points north.	Simplification-leave	The drawer needs the Sun off the vertical to give the shadow a side; the lesson says only "high" and "short", never "overhead", and L05-q10's fb says the Sun is not straight overhead. On the deliberately-omitted list.
S2	`pole_shadow_*` (L05)	review-physics Part 2	The flag's own shadow is not drawn, and the grazing ray passes through the flag.	Simplification-leave	The pole is the object the text names; the flag is a marker.
S3	L06 "Nothing turns Earth, and Earth never stops."	review-accuracy step 1	Earth keeps turning because nothing stops it (and its spin slows by milliseconds a century).	Simplification-leave	Why Earth spins and what keeps it spinning is grades 6-8 (the module's omitted list); the sentence is true at this level.
S4	`earth_two_places*`	review-figures (truth about position)	Texas and India are drawn exactly opposite; they are about 175° apart.	Simplification-leave	"Not to scale" on every disc; the swap after half a turn is the point.
S5	Five articles above 300 words	B1; the brief	384 / 345 / 370 / 307 / 373.	Simplification-leave	One line each in the calls table above.
S6	Intro and blurb: "the Sun goes down behind the park"	the module's own language rule (never "behind Earth" as a fact)	The intro says what the child sees, in the child's words.	Simplification-leave	An intro teaches nothing; L04 corrects the seeming with "seems to".
S7	L04-q7's distractor "They all travel around Earth together."	review-accuracy (the Moon does travel around Earth, once a month)	A pedant's second key for the Moon alone.	Simplification-leave	The stem asks why all three move the same way each night; Grade 4's sentence is the key; the Moon's own motion is Topic 21's.
N1–N6	The author's six calls	—	See the calls table.	Not an error	—
N7	L05 q4 → q5 (why the Sun's place changes → order the chain)	review-questions 17	q4's key and fb state the first two links of the chain q5 orders.	Not an error	The chain IS the lesson's rule, said on the rule card above the quiz; an order item on it cannot hide its links. The page shuffles the three happenings.
N8	PP-27 (and the type 8 "what to do for night" family)	review-questions 26	The routine's "turn the globe" step has one honest scene (a lamp, a globe, a sticker); PP-27 shares L03-q4's move with a fourth distractor.	Not an error	A routine atom is tested on its routine; the instance differs in person, place and option set. Recorded as the type's nearest-quiz note on the type sheet.
N9	PR-12 (Alabama tree) and PP-36 (Minnesota lamppost)	review-questions 26	Both ask which way an afternoon shadow points.	Not an error	The direction swing has one honest surface (an upright thing at two times); object, times and option form differ; the type sheet marks them ⟂ for a test draw.
N10	The ten Grade 4 root causes	ROOT_CAUSES_2026-10-07	Looked for one by one.	Not an error	1 bald jargon — "model" coined in the frame, S46 A = B = 0 · 2 invented misconceptions — five claims, each sourced to a register belief; none stated as a lesson sentence · 3 verdict with no question — both verdicts (L04, L06) recap and contradict · 4 "So" before a told fact — L02's coining line opens on the noun · 5 lettered cases — none · 6 vague phrasing — W4, W21 fixed · 7 heat as object — n/a · 8 contrasts not parallel — "daytime on the side facing / night on the side facing away", "low … long / high … short" · 9 convenience term tested — none coined · 10 first person — "we call it" frames stand · 11 quoted openers — one of six, documented.
N11	Grade 4 and Grade 3 sentences	B1 (an earlier rule reused word for word)	—	Not an error	G4T31 "Earth spins all the way around once in about 24 hours. One spin is one day." · "Earth takes about 365 days to travel once around the Sun. One trip around the Sun is one year." · "Earth spins, so the Sun, the Moon and the stars all seem to move across the sky. It is Earth that is turning, not the sky." · G4T30 "Every day, the Sun seems to move across the sky on a curved path. It comes up in the east, is highest around midday, and goes down in the west." · G3T13 "Light travels in straight lines, until it hits something." · "An object blocks the light. Its shadow is on the side away from the light source." — each checked against the earlier module's lexicon.
N12	Figures: all 48 renders and every built route	review-figures 1–17, 26; review-physics Part 2	Every PNG opened on its own render and on the page (six article routes, six quiz routes, intro, summary, practice, PP100); the page forces one colour scheme, so one shot each.	Not an error (after W1–W3)	Earth from above turns counterclockwise (the arrow over the top from right to left) on every disc; the sticker at the bottom edge is leaving the light (evening) and at the top edge entering it (morning) on the strip, the two edge items and the turn strip alike; the Sun's path runs east (left) to west (right) with its arrows; the post's shadow lands where the grazing ray lands at 25° and 70° and falls on the side away from the Sun in all six scenes; every item figure's alt and blind text give the dot's or the Sun's position and never day, night, long or short; the headache figures carry the teaching figure with the answer's layer off (place chips without DAY / NIGHT; the lamp and globe with no arrow; the chain with "?"; the table with its second column empty); every rule card says its lexicon line (after W3).
N13	Intro poll, summary, attached set	review-questions 34, 35	Ready line names the topic; three replies; "model" never said in the intro; the summary opens on the one sentence and recaps six rule lines in 166 words.	Not an error	Attached key string A A B B A B B A B (B 5 of 9).

Items changed after the read

Stem, option or scene: L01-09, L04-05 (key index 0 → 1), L06-09, PR-06, PR-08, PP-12, PP-13, PP-15, PP-16, PP-17, PP-25, PP-27, PP-36, PP-38, PP-42, PP-46; PP-45 (accept list and wrong-answer lines). Moved: the L02 plastic-skeleton term item from q4 to q10 (q5–q10 are now q4–q9). Feedback only: L02-01. Prose: L01 headache line 3, idea line 4 and script beat 1; L02 script beats 1, 2, 3, 5, 6; L03 one caption and script beats 2, 3; the topic blurb's third line. Figures: earth_two_strip (leaders), lamp_globe drawer (chip), rule_l02 (and rules_six through it). Type sheet: the changed exemplars and a change note at the foot.

Key strings after the fixes — attached A A B B A B B A B; two-option L01 A B B A B A · L02 B A A · L03 A B A · L04 B B A A · L05 A A B · L06 B A B B A A B; three-option L01 0 2 1 1 · L02 0 1 2 1 2 2 0 · L03 0 1 2 1 0 2 0 · L04 0 0 2 1 2 2 · L05 0 1 2 1 0 1 · L06 2 1 0; practice two-option B B, three-option 1 1 0 0 1 0 1 1 2 0 0; PP100 MCQ keys A 13 · B 8 · C 15 · D 11 of 47 (no letter above 32 %); every bank key index unchanged.

Article and script counts, before → after

Articles (the checker's count): L01 300 → 298 · L02 384 → 384 · L03 345 → 345 · L04 370 → 370 · L05 307 → 307 · L06 373 → 373. Scripts: L01 149 → 147 · L02 150 → 150 · L03 150 → 150 · L04 150 · L05 149 · L06 149. Intro 117, summary 166, unchanged.

Gates after the fixes

build_tools_check_topic.py → 0 FAIL, 17 WARN; S46-COUNTS B=0 C=0 D=0; S30 typed 11, 0 fail; S38 fragments 0. The WARNs are the author's answered S8 beats, S7 (typed items counted as A) and four S36 words (scientist, shelves, zoo, soccer).
build_tools_check_terms.py → 1 declared term, no hits.
grade5/check_g5_articles.py → 0 FAIL; scripts 147 / 150 / 150 / 150 / 149 / 149; intro 117; summary 166; opener ok.
check_key_tells.py → KEY TELLS: 0 of 135 MCQs flagged.
check_svg_ids.py → PASS (48 figures, 11 ids, 0 shared).
vault check_lessons.py --adapter tools/check_adapter_g5.json → 0 FAIL, 119 WARN; S118 silent. The S22 WARNs read L06's stems against L02's "model" key — the topic read as one page; the word is the topic's coined term.
Blind bundle re-cut to blind/2026-10-08-reviewed/ → 128 MCQ, 11 typed, 1 FRQ, 1 order; 141 held; adversarial rows 11; [Drawing:] lines grepped for night / daytime / evening / morning / midday / sunrise / sunset / long shadow / short shadow → 0 hits.
build_tools_video_batch.py → 8 videos (INTRO 117, L01–L06 143–146, SUMMARY 162), key string A A B B A B B A B; check_brief.py → seven ✓, the summary's standing protected-words note only; grep -ci strand → 0. Not sent.
Page rebuilt to /tmp/g5t20_review.html (6 lessons, 15 practice, 57 pp100, 48 figures); the three changed figures and the L01 article and L02 quiz routes re-shot and read.

Deliberately omitted (so the next reader does not re-report them)

The midday Sun's southward lean and the north-pointing midday shadow (an east–west side view); the flag's shadow; why Earth spins and what keeps it spinning; the slowing of Earth's spin; Texas and India not exactly opposite; time zones and clock times abroad; the Moon's own motion around Earth (Topic 21); the seasons and the tilt (patterns only, James's ruling); "orbit" and "hemisphere" as words; the day's length changing through the year.

Owed after this pass

The two cold readers (Role A) on blind/2026-10-08-reviewed/BLIND_BUNDLE_G5T20.md (the bundle is whole; no earlier read exists, so no changed-ids list); James's read of the six scripts (the Earth and Space sample) — the batch waits for his word; the picture pass on the 5 cartoon and 2 photo placeholders after his read. Nothing committed.

Adjudication (8 Oct 2026)

The blind read. Two cold readers on blind/2026-10-08-reviewed/, 141 items each: one real disagreement (PP-57); every other MCQ key agreed; the order item L05-05 matched first-to-last for both; all eleven typed answers on-list. The coordinator's seven further notes are applied below. Every key letter is unchanged.

Flag	Outcome
PP-57 — reader C chose A (the model gets "that Earth turns around" wrong, reading L06-q4's hand-and-stop case), reader B chose C and marked it two-defensible; L06 never names the Sun's SIZE as a fault of that model	Applied. One ask, one key from L06's taught list: "A class studies day and night with a lamp and a globe. Which thing does their model get wrong?" — the shape of Earth / how far away the Sun is / where the land and sea are / that Earth turns all the way around (L06's lamp row: "The lamp is small, and it sits close to the globe … the Sun is huge and very far away"). "Turns around" now appears in one sense only. A one-step pick is not hard, so the item is retagged medium and moved (stable) to the end of the medium block: it is now PP-43, and the former PP-43–PP-56 are PP-44–PP-57 with their text unchanged. Key letter B kept. Type sheet row 27 and the ⟂ lines renumbered. Bank: easy 21, medium 22, hard 14.
L03-07 and PP-26 — both readers right, but both inferred the turning sense from "the arrow over the top goes from right to left"	Confirmed and applied. The rendered figures were opened: the arrow over the top runs right to left, which is counterclockwise seen from above the North Pole (the lamp at the left; the bottom-rim sticker moving right, into the dark; the top-rim sticker moving left, into the light) — the same sense as L03's strip and L04's turn strip. Each edge item now carries a small straight arrow just outside the rim beside the sticker, pointing the way it moves; both renders re-opened. Blind text now says "the globe turns counterclockwise (anticlockwise) seen from above … a small arrow beside it shows it moving to the right, out of the light into the dark" (bottom) / "to the left, out of the dark into the light" (top). Alt text names the small arrow without the reading.
PR-01's stem "One day is one spin of Earth" handed over PR-09 on the same page	Applied. PR-01: "About how many hours does Earth take to spin all the way around once?"
L06-04 and L06-06 near-twin stems with opposite answers	Applied. L06-04 ends "Does the model get this right: that something has to keep turning Earth?" (no); L06-06 ends "Does the model get this right: that Earth turns all the way around?" (yes).
PP-25 "It shows only the roads" not quite true of a town map	Applied as "It shows just the roads and towns." (the coordinator's "…and towns, nothing else" drew the key-tell check at 43 characters against 30; the shorter form passes).
L02-06 (a picture in the mind is a model) and PP-29 (a trip round the lamp = one year): article AND script	Confirmed / applied. L02: article "A model can also be a computer program, or a picture in your mind."; script beat 4 says the full coining sentence with "a picture in your mind". L03: the article had "Earth takes about 365 days to travel once around the Sun. One trip around the Sun is one year."; the script did not — beat 4 now ends "it does not travel around the lamp, because that trip is a year", with beat 1 "How can she show night coming?" and beat 3 losing "as Earth turns" to hold 150 words (the rule beat still says "from west to east").
⟂ on the type sheet	Applied. PP-54 (the whole day's pattern explained) ⟂ PP-19, PP-37, PP-41.
PP-48 (now PP-49) accept list	Applied. The shared EARTH accept list (PP-49 and PP-51) takes "the Earth turning", "Earth turning", "the turning Earth".

Gates after the adjudication: check_topic 0 FAIL, 18 WARN, S46 B=C=D=0 · check_terms no hits · check_g5_articles 0 FAIL (scripts 147 / 150 / 150 / 150 / 149 / 149; articles unchanged) · check_key_tells 0 of 135 · check_svg_ids PASS · check_lessons 0 FAIL, S118 silent · bundle re-cut to blind/2026-10-08-adjudicated/ (128 mcq, 11 text, 1 frq, 1 order; 141 held; drawing-line grep 0) with CHANGED_IDS.md (seven ids and a numbering note, no key text) · batch rebuilt, 8 videos ✓, key string A A B B A B B A B, grep -ci strand 0 — not sent. Nothing committed.

The records, in full

The build record (v1, 8 October 2026)

Skill: course-build → write-lesson (write-example-sequence, design-check-sequence, sentence-atomise, write-explanation) → write-video-script, write-intro, write-summary, write-mcqs @ cca3af6

Grade 5 Topic 20 — Why the Sun crosses our sky — build record (v1, 8 October 2026)

What this is, in plain words

Six short lessons that take a Grade 5 child from "Earth spins once a day" (Grade 4) to the reason the Sun seems to cross the sky and the reason a flagpole's shadow swings round and shrinks. Simon's lunchtime call to his grandma in India opens it: it is day in Texas and night in India at the same moment, because one half of Earth faces the Sun and the other half faces away, and the Sun never stops shining (L01). Miss Thornton points a lamp at the classroom globe, and the lesson says why a scientist uses a thing that stands in for the real thing: the whole Earth is too big to watch at once; "model" is coined here, the one term the topic owns (L02). Tamsin turns the globe from west to east and the class watches night come to the sticker's town and morning come back; one full turn stands for one day, and the globe spins on its stand, it does not travel around the lamp (L03). Soren says the Sun travels around Earth once a day because you can watch it cross the sky; the merry-go-round and the turning town answer him: the Sun stays where it is and Earth turns (L04). The capstone chains it to the flagpole: Earth turns, so the Sun's place in the sky changes, so the shadow's direction and length change (L05). Soren then holds the smooth little globe and the class asks of each feature "Does the model get this right?", and finds three rights and four wrongs; every model is different from the real thing in some way (L06). James chose this topic for his Earth and Space review sample: its scripts wait for his read, and no batch has been sent.

Counts

Lessons 6 (L01 SPA5-004, L02 SR5-030, L03 SPA5-006, L04 SPA5-005, L05 SPA5-007 the capstone, L06 SR5-031). Scripts 149 / 150 / 150 / 150 / 149 / 149 spoken words (the batch tool counts 145 / 146 / 146 / 144 / 145 / 145 without the closing line). Articles 300 / 386 / 345 / 360 / 305 / 373 words (17 / 19 / 18 / 17 / 18 / 24 idea lines; 6 / 6 / 7 / 5 / 8 / 4 figures; 4 / 5 / 4 / 5 / 6 / 5 subtitles; longest run of idea lines without a figure or subtitle 4 / 3 / 4 / 6 / 3 / 8). Intro 117 words, 2 question marks. Summary 166 words, one part.
Quiz items 10 / 10 / 10 / 10 / 10 / 10 (60: 59 MCQ, 1 order). Attached questions 9 (six lessons, three summary). Recall bank 7. Practice 15 (13 MCQ, 1 typed, 1 FRQ; 3 Grade 3 / 4 retrievals first). PP100 57: 47 four-option MCQs, 10 typed; per atom SPA5-004 12, SR5-030 9, SPA5-006 9, SPA5-005 10, SPA5-007 10, SR5-031 7; easy 21, medium 21, hard 15. Type sheet: 28 types, records/TYPES_G5T20.md.
Figures 48: 41 SVG by code, 5 cartoon placeholders, 2 photo placeholders. Every figure carries an IMAGE_KINDS entry and every placeholder an IMAGE_BRIEFS entry.

Structural decisions (in place of a blueprint)

Lesson order and titles. The architecture row's order. L01 "Day on one side of Earth, night on the other" · L02 "Why scientists use a model" · L03 "Show day and night with a globe and a lamp" · L04 "Why the Sun seems to cross our sky" · L05 "Why shadows change through the day" (the capstone, SPA5-007) · L06 "Where the globe model gets it wrong". L02 sits before L03 because L03 is the model in use: "model" is coined, then used; L06 closes the topic because its run needs every earlier lesson's globe-and-lamp facts.

Headache scenes and who asks. L01: Simon at lunch in Texas; his grandma in India calls and her window is black; the NARRATOR asks why it is night at her house. L02: Miss Thornton points a lamp at the globe because nobody can step back and watch Earth turn; the narrator asks why a scientist uses a globe and a lamp to study the real Earth and Sun (a teacher doing the science; nobody voices a claim). L03: Tamsin at the globe; Miss Thornton asks her to show the class how night comes and morning comes back — a teacher asking what a teacher asks; the narrator closes with "So what should Tamsin do with the globe?" L04: Soren at the park says the Sun travels around Earth once a day because you can watch it cross the sky — a QUOTED claim, allowed because it is the register's documented belief 1 and the lesson's whole point; the verdict recaps the claim and contradicts it ("So, when Soren said …, he was not right."). L05: Simon's class in the schoolyard at three times; the flagpole never moves; the narrator asks why its shadow changes. L06: Soren holds the globe after the lesson; the narrator asks whether the real Earth is like the globe in every way. Openers vary: a call, a desk, a demonstration, a quoted claim, a schoolyard, a thing held. One named child per scene; Miss Thornton appears only where a teacher's act is the scene.

Example sequences, written out.

L01 (fact true of every moment, positives only — no honest non-example exists for "one half faces the Sun"): Texas on the lit half (day) and India on the dark half (night) at one moment → the same two places twelve hours later, swapped → the hard-to-spot member: at night the Sun has not gone out, it is shining on the other half. Rule last.
L02 (fact with its coining, three members then the name): the whole Earth, too big to see at once, a globe stands in → the tiny pieces of water, too small to see, a drawing stands in → a mountain wearing away, too slow to watch, a computer program stands in → the name coined → the belief case: the flat map against the picture of the whole town (a model shows the part you are studying). Rule last.
L03 (routine): the lamp, the globe, the sticker and what each stands for → the lit half and the dark half → turn from west to east: midday → evening → midnight → morning → midday again (a quarter turn each) → one full turn is one day → the globe stays on its stand (the year is a trip around the Sun). Rule last.
L04 (explanation): the merry-go-round (the trees seem to go past; Soren is the one turning) → the turning town on the drawn Earth: turning to face the Sun (sunrise in the east), facing it (midday), turning away (sunset in the west) → the same story from the ground (the Sun's path) → the verdict on Soren → rule.
L05 (the capstone chain): what a shadow is (Grade 3's two sentences) → morning: the Sun low in the east, light in low, a long shadow pointing west → midday: the Sun high, a short shadow → afternoon: the Sun low in the west, a long shadow pointing east → why the Sun's place changes (L04's sentence; the lamp-and-globe model) → the chain card filled → rule.
L06 (categorical run on a KIND category, sequences block, S118 silent): frame "Does the model get this right?", the model, the desk and the drawing held still, the feature compared as the case — shape (yes) → turning around (yes) → size (no) → land and sea drawn where they are (yes) → smooth all over (no) → a hand turns it and it stops (no) → the lamp small and close (no). p p n p n n n: both crossings (p→n at the size, n→p at the land and sea). Then Soren's smooth-Earth claim (the register's induced belief), recapped and contradicted. Rule last.

Check types. L01 (a) fluency on the drawn Earth and the fact, then (c) why / claim / transfer. L02 (a) fluency on the why-a-model reasons, term recognition, the claim, two is-this-a-model cases, apply, transfer. L03 (b) scaffolded (one ask per step) then bare (the drawn edge case, what next, half a turn, the flashlight transfer). L04 (c) what / why / claim / transfer. L05 (c) what / why / transfer with a fluency pair on direction from a drawing and one order item on the chain; no claim item (the register names no belief for SPA5-007 itself). L06 (a) fluency on the frame with fresh features, the claim, two transfers to other models.

Videos. All six lessons get a video: L01 and L03 and L04 carry the turning (the dots swapping halves; the sticker going round; the town turning past a still Sun), L05 carries the Sun's climb and the shadow's shrink, L02 and L06 are short enough that the drawing building up (the table filling) is the lesson. None "could do without a video".

Recall bank (ruling 11). Seven items, none in a quiz: before L01 — SPA4-007 (one spin is one day); before L03 — SPA4-008 (one trip around the Sun is one year); before L04 — SPA4-001 (up in the east, down in the west) and SPA4-009 (it is Earth that is turning); before L05 — ENE3-011 (straight lines), ENE3-012 (the shadow is on the side away from the light source), SPA5-001 (shortest around midday, Topic 19). L02 and L06 lean only on the lesson immediately before, so no recall.

The three shortened rule lines (a decision, not asked). L03's, L05's and L06's rule lines were cut to fit the 150-word script with the whole set-up spoken: L03 now says the steps and "one full turn stands for one day" (the sticker's path is a forest line, not the rule); L05 says "a shadow's direction and length"; L06 drops "check what it gets wrong before you trust it" from the rule (it stays as an idea line). The lexicon, the rule steps, the rule cards and the scripts all carry the shortened lines word for word.

Questions for James

None. Every call here is one his answer would not change what a student learns by (names, example order, which features the L06 run compares, the order of the two model lessons around the routine), or is a ruling he has already given (seasons patterns-only; the tilt never; "model" coined because TEKS 5.2A names it).

Per-lesson table

Lesson	Atom	Type	Headache (who asks)	Rule (lexicon)	Script	Quiz
L01	SPA5-004	fact true of every moment	narrator: why is it night at his grandma's house?	It is daytime on the side of Earth facing the Sun, and night on the side facing away from the Sun. The Sun never stops shining.	149	10 (a)+(c): 6 two-option, 4 three-option
L02	SR5-030	fact with its coining	narrator: why does a scientist use a globe and a lamp?	An object, a drawing, a computer program or a picture in your mind that stands in for the real thing is called a model. Scientists use a model to study something too big, too small or too slow to watch.	150	10 (a): 3 two-option, 7 three-option
L03	SPA5-006	routine	Miss Thornton asks Tamsin; narrator: what should Tamsin do?	To show day and night, shine a lamp on a globe, mark your town with a sticker, and turn the globe slowly from west to east. One full turn stands for one day.	150	10 (b): 3 two-option, 7 three-option
L04	SPA5-005	explanation meeting the documented belief	Soren's claim (register belief 1); narrator: is he right?	The Sun seems to cross our sky because Earth turns, not because the Sun moves. As your side of Earth turns to face the Sun, the Sun seems to come up in the east. As your side turns away, the Sun seems to go down in the west.	150	10 (c): 4 two-option, 6 three-option
L05	SPA5-007	capstone explanation (the chain)	narrator: the flagpole never moves, so why does its shadow change?	Earth turns, so the Sun's place in the sky changes, and so a shadow's direction and length change too. When the Sun is low, the shadow is long. When the Sun is high, the shadow is short.	149	10 (c): 3 two-option, 6 three-option, 1 order
L06	SR5-031	categorical run (kind category)	narrator: is the real Earth like the globe in every way?	Every model is different from the real thing in some way. The globe is tiny and smooth, and a hand turns it; the lamp is small and close.	149	10 (a): 7 two-option, 3 three-option

Design-check-sequence records

Skill: design-check-sequence @ cca3af6

Part: L01 (SPA5-004)

Type: (a) one-step fluency on a fact true of every moment, then (c) — the register names a belief (night = the Sun goes out or hides).

Plan: drawn dot, lower left (day) → drawn dot, upper right (night) → Denver midnight: which side (B) → Chicago midday: which side (A) → WHY Ohio and Australia (3 opt, 0) → CLAIM Tamsin: the Sun switches off (no) → TRANSFER Oregon night: where is the Sun shining (3 opt, 2) → TRANSFER the other half at the same moment (A: night listed first) → spacecraft picture: how much is lit (3 opt, 1) → true sentence about the Sun at night (3 opt, 1). Two-option A B B A B A; three-option 0 2 1 1. Hard-to-spot member tested: night is not the Sun switching off (q6, q7, q10).

Belongs in practice/test instead: the four-option side and night-reason sets; the twelve-hours-later drawn item; the Spain–New Zealand sentence; typed Earth (PP types 1–3, 8, 28).

Skill: design-check-sequence @ cca3af6

Part: L02 (SR5-030)

Type: (a) one-step: name why a model is used (too big / too small / too slow) and sort a case as a model or not; the register names a belief (the best model looks exactly like the real thing).

Plan: the whole Earth (3 opt, 0) → the river wearing rock (3 opt, 1) → the pieces of water (3 opt, 2) → TERM recognised among sisters (3 opt, 0) → CLAIM Simon: the exact-looking model (no) → the plastic heart: a model? (yes) → the picture in Tamsin's mind: a model? (yes) → the globe with no clouds or cities: which sentence is true (3 opt, 1) → the wooden bridge (3 opt, 2) → the water-cycle drawing: why (3 opt, 2). Two-option B A A; three-option 0 1 2 0 1 2 2. The typed recall of "model" sits LAST in the practice set (PR-15) and twice in the bank (PP-43, PP-44), not in this quiz: the vault's S26 reads a Grade 3–5 topic module as one page, so a typed term item inside L02 can never be the topic's last live check (its "no typed item" note is answered here).

Belongs in practice/test instead: the four-option why set; the toy train and volcano drawing; the storm program and the map-or-photo reason; typed model (PP types 4, 5, 8, 17).

Skill: design-check-sequence @ cca3af6

Part: L03 (SPA5-006)

Type: (b) multi-step routine (set up the lamp and the globe, mark the town, turn it from west to east, read the sticker's time), each step asked once, then bare.

Plan: what the lamp stands in for (3 opt, 0) → what the sticker stands in for (3 opt, 1) → which half is daytime (A) → what to do for night (3 opt, 2) → how much time one full turn stands for (3 opt, 1) → CLAIM Soren: round the lamp = one day (no; the register's induced belief, counter SPA5-006) → BARE drawn edge: the sticker at the bottom edge, the arrow drawn (3 opt, 0) → BARE what happens after night (3 opt, 2) → BARE half a turn from midday (3 opt, 0) → TRANSFER flashlight and tennis ball (yes). Two-option A B A; three-option 0 1 2 1 0 2 0. Drawer direction convention: the arrow over the top from right to left (counterclockwise seen from above the North Pole); the bottom edge is evening, the top edge morning, stated once here.

Belongs in practice/test instead: the stands-in and time sets; the top-edge drawn item (morning); the half-turn hours; the trip round the lamp; typed the Sun, one day (PP types 6, 7, 8, 11, 18).

Skill: design-check-sequence @ cca3af6

Part: L04 (SPA5-005)

Type: (c) concept understanding — a mechanism (Earth turns; the Sun seems to move) with the register's pre-existing belief 1.

Plan: WHAT is really moving (3 opt, 0) → WHAT the Sun seems to do as a town turns toward it (3 opt, 0) → WHY the Sun seems to go down (3 opt, 2) → CLAIM Tamsin: the Sun travels round Earth each day (no) → Kansas midday: which way it faces (3 opt, 0) → TRANSFER the turning chair (B) → WHY the Moon and stars move the same way (3 opt, 2) → TRANSFER Earth stopped turning: would the Sun stay in one place (yes) → Nevada hill: is her side turning away (yes) → Miami sunrise: what Miami is doing (3 opt, 2). Two-option B B A A; three-option 0 0 2 0 2 2 (the vault's S116 forbids four alternating keys in a row across mixed two- and three-option items, so q7 and q8, and q9 and q10, were swapped).

Belongs in practice/test instead: the really-moving and direction sets; sunset; Earth turning twice as fast; the spinning ride; Simon's claim by reason; typed Earth, east, west (PP types 8–10, 19–21).

Skill: design-check-sequence @ cca3af6

Part: L05 (SPA5-007)

Type: (c) concept understanding — the chain Earth turns → the Sun's place changes → the shadow changes; no documented belief for this atom (the shadows-stay-the-same belief is Topic 19's), so no claim item.

Plan: WHAT the midday shadow is (3 opt, 0) → drawn post, the Sun to its right: which side (A) → WHY the morning shadow is long (3 opt, 1) → WHY the Sun's place changes (3 opt, 2) → ORDER the chain, first to last (position 5, after the first third; key stored first → last) → TRANSFER afternoon shadow direction (3 opt, 1) → TRANSFER his own shadow at midday (3 opt, 0) → shadow shortening: is the Sun climbing (yes) → points west at nine: still west at five? (no) → drawn post, the Sun high: which sentence (3 opt, 1). Two-option A A B; three-option 0 1 2 1 0 1. Why-case freshness: the why items sit on a mailbox and the bare Sun's-place question, neither in the article (the article's cases are the flagpole at three times).

Belongs in practice/test instead: the midday-shadow set; the two drawn posts; the lamppost's afternoon direction; the Louisiana stick reason; Tamsin's claim by reason; the whole-day sentence; typed east / west (PP types 12–14, 22–25).

Skill: design-check-sequence @ cca3af6

Part: L06 (SR5-031)

Type: (a) one-step categorisation on the frame "Does the model get this right?", with the register's induced belief 2.

Plan: size (no) → shape (yes) → smooth surface (no) → the hand that lets go (no) → land and sea (yes) → the full turn (yes) → CLAIM Soren: Earth must be smooth (no) → TRANSFER the two-circle drawing (3 opt, 2) → TRANSFER the Colorado map (3 opt, 1) → which does the lamp-and-globe model get wrong (3 opt, 0). Two-option B A B B A A B; three-option 2 1 0.

Belongs in practice/test instead: the gets-wrong set; the Moon model; the zoo map; Soren's claim by reason; right-and-wrong at once (PP types 15, 16, 26, 27).

The key strings

Attached questions in video order (L01–L06, summary 1–3): A A B B A B B A B — B 5 of 9.
Lesson quizzes, two-option: L01 A B B A B A · L02 B A A · L03 A B A · L04 B B A A · L05 A A B · L06 B A B B A A B; three-option: L01 0 2 1 1 · L02 0 1 2 0 1 2 2 · L03 0 1 2 1 0 2 0 · L04 0 0 2 0 2 2 · L05 0 1 2 1 0 1 · L06 2 1 0. Practice two-option B B, three-option 1 1 0 0 1 0 1 1 2 0 0. Recall bank three-option 0 2 1 0 2 2 1.
PP100 MCQ keys: A 13 · B 8 · C 15 · D 11 (47 MCQs); the ten typed items carry no letter. The topic checker's S7 WARN ({0: 23, …}) counts the ten typed items' key index 0 as letter A; read on the MCQs alone no letter carries more than 32 %.
Claims: five in the quizzes (L01 Tamsin, L02 Simon, L03 Soren, L04 Tamsin, L06 Soren), all keyed No — recorded: each is a register belief whose TRUE twin would be the lesson's own rule. Three bank claims (PP-47 Simon, PP-52 Tamsin, PP-56 Soren), all in the "X is wrong … What is the correct reason?" form; no verdict-and-reason exception named.
Order item: one (L05-q5); the key is stored first → last, the way the stem asks; no sibling asks the reverse. Lettered drawings: none (the dot and the post are named by position).

The rules applied (rulings 1–13 of the brief, and the vault)

Rule	Where it bites here
1 Openers: the scene, the narrator asks; a student speaks only for a documented belief	five of six headaches are narrator-asked; L04's opener is Soren's claim because it is register belief 1 and the lesson's point; the verdict recaps and contradicts ("So, when Soren said …, he was not right.")
2 No per-lesson misconception slot	five claim items, each with a `source` line naming the register belief and the lesson line; L05 has none
3 A sentence's subject is a noun	"The Sun never stops shining"; "Earth turns"; "the sticker moves"; no bare "it" that could be misread (S38 silent)
4 The video stands alone	every script opens on its own scene and people, says every set-up line and the whole rule; 144–146 words in the brief
5 What before why	L01 shows the two places lit and dark before saying why; L05 shows the three shadows before the chain; L06 asks the frame before each verdict; S118 silent on the one `sequences` block
6 Terms: required coined in the frame, reused, recapped, tested; "so" only for a deduction	"model" coined in L02 ("… is called a model"), said in L03–L06 and the summary, recognised in L02-q4 and PR-7, typed in PR-15 and PP-43/44 (S46 A = 0, B = 0, C = 0, D = 0); "So, here's what we've seen" opens L01's rule beat (James's 8 Oct boundary); L02's coining beat opens on the sentence, not on "So"
7 Precise verbs	"the Sun seems to cross / come up / go down", "Earth turns", "the lamp stands in for", "the pole blocks the light"; never "the Sun rises" as a fact of the Sun, never "leak / lift / snap"
8 No lettered cases	the dot, the sticker and the post are named by position; the chain's boxes by their words
9 Contrasts in one frame	"It is daytime on the side of Earth facing the Sun, and night on the side facing away from the Sun." · "When the Sun is low, the shadow is long. When the Sun is high, the shadow is short." · L06's table rows
10 Forces named	no force is named or needed in this topic
11 Recall bank	seven items, each tagged `recalls` and `before`; none from the lesson immediately before
12 Verdict + reason options	lesson claims bare yes / no with the correction in the why; bank claims "What is the correct reason?" with single-statement reasons; no exception
13 No new rules	one collision recorded below (S26 against the term-item-last rule)
Earth's pull / gravity	not touched
Light carries energy; a shadow is where light is blocked (Grade 3 Topic 13's words)	L05 recalls "Light travels in straight lines, until it hits something." and "An object blocks the light. Its shadow is on the side away from the light source." word for word
Lesson text states the fact, never the topic that taught it	"Earth spins all the way around once in about 24 hours. One spin is one day." · "Earth takes about 365 days to travel once around the Sun. One trip around the Sun is one year." — no "in Grade 4 you saw"
A coined term is used from then on, with a recap on first reuse	"model" in L03 ("The lamp stands in for the Sun…"), L04 ("In the globe-and-lamp model, the lamp stays still too") and L05, L06
Say the specific thing; no "meaning what?" phrase	"the half facing the Sun", "the sticker moves from the lit half into the dark half"; "stub" became "a short mark"
Units as words; numerals on screen	"about 24 hours", "eight in the morning", "thousands of miles"; chips print "8 IN THE MORNING"
Biggest / smallest for size only (S39)	0 hits after "gets smaller" became "shorter"
Every sentence has a subject and a verb (S38)	0 fragments
An attached question stands alone (S27)	each names its own scene (Peru, a plastic globe, a lamp and a sticker, Georgia, a post at midday, a smooth globe; Chile, a toy boat, Ohio)
Recognition before recall; typed only for a closed spellable word (S30, S33, S34, S35)	"model" recognised before typed; S30 clean on eleven typed items; nothing in RECALL_BY_MCQ
A quiz climbs recognise → apply → produce (S32)	the order item at L05 position 5; no typed item in any quiz's first third
Fresh instances (S10; the scene-noun grep)	0 S10 warnings after the working words were declared; the bank and practice carry none of the lesson scenes (grep below)
A real thing survives the claim made about it	India is night at Texas lunchtime (eleven and a half hours ahead); Australia is dark at Ohio lunchtime; Thailand dark at Florida school time; Spain day while New Zealand night; Chile, Peru, Japan, Kenya, Mexico, Nebraska, Delaware as places only
Code draws what must be exact; David's pack renders what must look real	41 SVG (Earth from above, the lamp and globe, the Sun's path, the post and its shadow computed from the Sun's angle, the chain cards, four tables, six rule cards, the summary strip); 5 cartoon and 2 photo placeholders with briefs; no person or hand drawn as a glyph
One depiction per thing, reused everywhere	Earth from above is Grade 4 Topic 31's `spin_disc` imported (the Sun at the left, the lit half left, the arrow right-to-left over the top, the red town dot); the small Sun is Grade 4 Topic 30's; the straight light ray is Grade 3 Topic 13's; the lamp-and-globe form, the Sun's path over flat ground and the post are registered here as variants and never share a page with the originals
A figure is checked on its render	every figure rendered to /tmp/g5t20_figs and read at 800 px; the two-place chips moved onto leaders after the first render overlapped the Sun; the post's rays redrawn as parallel light with the Sun back along the grazing ray (the first draft put the Sun below the pole's top); the strip's second ray dropped; all six article routes and the L03 quiz route screenshotted from the built page and read
Every inline id unique	`check_svg_ids.py` PASS (11 ids, all Topic 29's per-render gradient counter)
An item figure's blind text is data	the dot "at the lower right", the Sun "low to the left of the post", "no shadow and no lines of light are drawn"; grep below
Summary opens with the one sentence and recaps rules, not examples	"Here's everything we found out about why the Sun crosses our sky." then one rule sentence per lesson, 166 words, "Okay, now your turn."
Intro teaches nothing, coins nothing, ≤ 3 question marks, map line after a question	Tamsin at the bus stop morning and evening; "So why does the Sun cross our sky every day?" → "To find out, we will look at …" → the ready line; "model" never said; 117 words, 2 question marks

The documented misconceptions used, and the beliefs deliberately not stated

Belief (source)	Where the lesson meets it	The item
The Sun really travels around Earth once a day — you can watch it go (register SPA5 SD-1 belief 1, pre-existing)	L04: Soren's claim; the merry-go-round; "The Sun stays where it is. Earth turns"; the verdict recapped and contradicted	L04-q4 (Tamsin, no); PP-47 (Simon, by reason)
Night happens because the Sun goes out, or hides behind clouds or mountains (belief 2, pre-existing)	L01: "At night, the Sun has not gone out, and nothing is hiding it. The Sun is shining the whole time, on the other half of Earth."	L01-q6 (Tamsin, no); the mountains and clouds as distractors in L01-q5, q7, q10 and PP types 2
Day and night come from Earth orbiting the Sun once a day (belief 3, induced)	L03: "The globe spins on its stand. It does not travel around the lamp. Earth takes about 365 days to travel once around the Sun."	L03-q6 (Soren, no); PP-29 (the trip round the lamp is a year); "Earth, traveling around the Sun" as a distractor in the really-moving set
The best model looks exactly like the real thing (register SR5 SD-3 belief 1, pre-existing)	L02: the flat map against the picture of the whole town; "A model shows the part you are studying, so it does not have to look exactly like the real thing."	L02-q5 (Simon, no); PP-25
If the model shows it, the real thing is exactly like that (SR5 SD-3 belief 2, induced)	L06: the smooth globe row; Soren's smooth-Earth claim recapped and contradicted	L06-q7 (Soren, no); PP-56 (Soren, by reason)
A shadow is a thing; it follows you; the Sun makes it (catalogue LGT-05); a shadow is always your size (LGT-08)	avoided by wording: a shadow is "the dark place where the pole has blocked the light"; it "points" and is "long" or "short", never "follows" or "moves on its own"	no item states them
Shadows stay the same all day (SPA5 SD-1 belief 4)	Topic 19's; recalled as a fact in the recall bank, never stated here	—

Checker results, every WARN answered

build_tools_check_topic.py: 0 FAIL, 20 WARN. S46 A = 0, B = 0, C = 0, D = 0. S30 typed = 11, fail 0, warn 0. S37 strand = 0. S38 fragments = 0. S39 / S40 / S41 / S42 / S43 / S44 / S45 = 0.
12 × S8 "beat carries 3+ sentences": kept — the scene beat of each script carries the scene, the happening and the question in short sentences (the 7 Oct standing-alone rule), and L06's two run beats carry two frame questions each; every beat is under the 150-word cap.
S7 PP100 key positions: answered above (the typed items' index 0 is counted as A; the MCQs alone are 13 / 8 / 15 / 11).
S36 words (6): "scientist" ×11 — kept, the TEKS word the topic is about (SR5-030's behaviour says "scientists"), explained by the lesson's own cases; "skeleton" ×3 — kept, a thing every Grade 5 child has seen in a classroom; "soccer" ×3 — kept, "soccer ball" is the US child's word; "spacecraft" ×1 and "astronaut" ×1 — kept, both words a US ten-year-old knows; "shelves" ×4 — kept, a library's shelves (swapped in for "bookshelves"); "zoo" ×3 — kept. Swapped before this run: "stub" → "a short mark", "halves" → "sides", "simply" cut, "swung" → "turned", "shrinks" → "shorter", "demonstration" → "the lesson", "bookshelves" → "shelves", "satellite" → "spacecraft".
build_tools_check_terms.py: no A, B, C or D hits ("model" coined in L02, reused in L03–L06 and the summary).
grade5/check_g5_articles.py: 0 FAIL; six scripts 149–150, intro 117, summary 166, opener ok. Five articles above 300 (L02 386, L03 345, L04 360, L05 305, L06 373) — kept: each has a subtitle or figure within every 8 idea lines (L06's run of 8 is the seven-case sequence with its table after it), and each section feeds an item (L02's map-and-photo, L03's "the globe stays on its stand", L04's "the same story from the ground", L06's seven features); the brief allows above 300 with the counts printed.
check_key_tells.py: KEY TELLS: 0 of 135 MCQs flagged (a: 0, b: 0, c: 0); fixed sets declared in KEY_TELL_EXEMPT_SETS.
check_svg_ids.py: PASS (48 figures, 11 ids, 0 shared).
check_lessons.py --adapter tools/check_adapter_g5.json: 0 FAIL, 122 WARN; S118 silent (the L06 block passes one change per step, both crossings). Warnings: S11 "fb[key] is not empty" ×75 — this course's items carry a confirming fb on the key by the Grade 3–5 schema (as Topic 1's do); S22 "a later stem carries an earlier key 'night'" ×31 — the two-option day / night keys are the topic's own words and every later stem must say them; S26 "the lesson coins a term but the set has no typed term-recall item" — answered in L02's check record (the typed recall is last in the practice set and in the bank); S8 ×12 as above.
build_tools_names.py Simon Soren Tamsin Thornton: all four from Topic 20's row; Simon, Soren and Tamsin recur in other topics' modules — information only (James, 6 Oct 2026); within this topic each name is one child.
Site: /tmp/g5t20_test.html builds (6 lessons, 15 practice, 57 pp100, 48 figures); the six article routes and the L03 quiz route screenshotted at 800 px and read — every figure present, nothing empty, nothing out of frame.
Blind bundle: grade5/topic20_build/blind/2026-10-08/ cut — 128 MCQ, 11 typed, 1 FRQ, 1 order; 141 held; adversarial rows 11. Blind-text grep: no [Drawing: …] line carries night, daytime, evening, morning, midday, sunrise, sunset, long shadow or short shadow (0 hits).
Bank freshness grep (the scene nouns grandma, tablet, lunch, India, Texas, desk, merry-go-round, park, flagpole, schoolyard, yard, trees, window, demonstration against the bank and the practice): 0 hits after the Texas midnight, the Kenya window, the Michigan park bench, the park map, the two flagpoles and the park-bench were re-scened; "sticker" (9 bank, 3 practice) stays — it is the routine's instrument, the topic's working word, not a scene.
Video batch: handoff/G5T20/videos/batch_G5T20.json (8 videos: INTRO 117 words, L01–L06 144–146, SUMMARY 162) and READY.md; check_brief.py: seven ✓, the summary's standing protected-words note only (162 protected of 162); grep -ci strand = 0. Not sent. The attached key string A A B B A B B A B.

The recall bank

Recalls	Before	Item
SPA4-007 (Grade 4 Topic 31 L01)	L01	Earth spins all the way around once. About how long does one spin take? — about 24 hours
SPA4-008 (Grade 4 Topic 31 L02)	L03	Earth travels once around the Sun. About how long does that trip take? — about 365 days
SPA4-001 (Grade 4 Topic 30 L01)	L04	Where does the Sun seem to come up, and go down? — up in the east, down in the west
SPA4-009 (Grade 4 Topic 31 L05)	L04	The star patterns seem to move across the sky. What is really turning? — Earth
ENE3-011 (Grade 3 Topic 13 L02)	L05	How does light travel from a lamp to a wall? — in straight lines
ENE3-012 (Grade 3 Topic 13 L03)	L05	A flashlight shines on a ball from the left. Which side is the shadow on? — the right, away from the flashlight
SPA5-001 (Grade 5 Topic 19)	L05	A pole's shadow is measured through one day. When is it shortest? — around midday

Sentence-atomise self-check (one row per lesson; the per-paragraph pass was run on every idea line, caption, headache line and script beat before the counts above)

Lesson	Ideas per line	Cause before effect, named actor, verb carries the cause	Plain word before the term	Links stated	Built back up
L01	one each (17 lines ≤ 22 words)	"Sunlight comes from the Sun at the left, so the half of Earth facing the Sun is lit up."	"the lit half … daytime", "the dark half … night"	"so" on every result line	the rule restates the two halves and the Sun
L02	one each; the coining split into two lines	"The whole Earth is far too big to see all at once." → "The globe … stands in for the real Earth"	"a thing that stands in for the real thing" before "model"	the map's "because it shows the part you need"	the closing return names the globe and lamp as a model
L03	one each; each quarter turn its own line	"Light from the lamp reaches the half of the globe facing it, so that half is lit."	"the lamp stands in for the Sun" said before any step	"so it is midday in Tamsin's town"	the return: Tamsin turns the globe and the class watches
L04	one each; the long sunrise line split	"The Sun stays where it is. Earth turns, and the town goes round with it."	"the Sun seems to" on every seen motion	"As the town turns to face the Sun … it seems to come up"	the return: the Sun sinking over the trees was Soren's side turning away
L05	one each (three subtitles for three times)	"The light comes in low, so the shadow is long, and it points west."	"That dark place is the shadow." before any shadow sentence	the chain card's two arrows	the return: the flagpole stood still, Earth turned
L06	one each; each case a statement line and a verdict line	"A hand turns the globe, and the globe stops when the hand lets go."	"a model" already coined; "huge, thousands of miles across" for the size	"Does the model get this right?" before every verdict	the return: shape and turning right, size and surface wrong

Judgement calls and rule collisions

The typed "model" item is in the practice set and the bank, not in L02's quiz. The course rule puts a term's typed recall last in its lesson's quiz; the vault's S26 reads a Grade 3–5 topic module as one page and FAILs any typed term item that is not the topic's last live check. Decided for the student: the recognition item stays in L02 (q4), the typed recall is the practice set's last item (PR-15, after PR-7 offers the term) and the bank's hard tier types it twice. Recorded for the coordinator as a checker-shape collision, not a rule.
Three rule lines shortened to fit the standing-alone script (L03, L05, L06; above). The meaning is unchanged; the dropped clauses are forest or idea lines.
L04's opener is a quoted claim. Allowed by ruling 1 (the belief is register SPA5 SD-1 belief 1 and the lesson's point); the other five openers are the narrator's.
L06 is a KIND category in the sequences block ("boundary": "kind"): the feature compared is the case and changes at every step; the model, the desk and the drawing hold. S118 is silent.
The east–west direction of turning is taught in words ("from west to east, the direction Earth really turns") and drawn as Topic 31's one arrow; the drawer's convention (counterclockwise from above the North Pole; the bottom edge is evening, the top edge morning) is stated once in L03's check record.
Twelve-hour pairs are chosen so the far place is really dark: Texas lunch ↔ India night; Ohio ↔ Australia; Florida ↔ Thailand; Spain ↔ New Zealand. No clock times in other countries are stated.
The post's shadow is computed, not guessed: sunlight is drawn as parallel rays at 25° (morning and afternoon) and 70° (midday), the shadow's end where the grazing ray lands; the Sun is drawn back along that ray. The strip's small panels carry the grazing ray only.
"midday" and "half" are not typed: S30(a) refuses a typed key that is not a lexicon term, a name or a number; both became four-option MCQs (PP-41, PP-42). Typed items: 10 (model ×2, Earth ×2, east ×2, west ×2, one day, the Sun) — every closed, spellable production the topic offers; recorded against the brief's "roughly 12–18".
Twenty-eight types on the type sheet, more than the ceiling: six atoms × (fact, apply, produce) plus the capstone's four forms; the sheet says which rows could be read as one family.
The two-option L01 key string B-heavy on the night items is read with the three-option items (A 3 of 6).

Owed

The non-author reads: review-figures over the 48 renders and the built pages; review-questions over the 60 quiz items, 9 attached, 15 practice, 7 recall and 57 bank items; review-accuracy (an Earth-and-Space reader: the India / Australia / Thailand / New Zealand day–night pairs, the 25° / 70° shadow geometry, "nothing turns Earth").
The blind read of blind/2026-10-08 (two cold readers; the adversarial-answer rows for the eleven typed items).
James's read of the six scripts and this record (the Earth and Space sample); only after his taps does handoff/G5T20/videos/batch_G5T20.json go — nothing has been sent.
The picture pass: 5 cartoon and 2 photo placeholders through David's pack (generate-figure, qc-figure), after James's read.
Nothing committed.

Topic 20 "Why the Sun crosses our sky" — your read (8 October 2026)

Skim first

The lessons and their rules

The intro script (117 words, about 58 s)

The question types (from TYPES_G5T20.md)

The questions the author put to you

Questions for James

Applied without asking

The lessons

Also on the site

After you answer

What the reviews found, and what changed

Grade 5 Topic 20 — Why the Sun crosses our sky — non-author review and fix pass (8 October 2026)

The short version

The author's calls, judged

Findings

Items changed after the read

Article and script counts, before → after

Gates after the fixes

Deliberately omitted (so the next reader does not re-report them)

Owed after this pass

Adjudication (8 Oct 2026)

The records, in full

Grade 5 Topic 20 — Why the Sun crosses our sky — build record (v1, 8 October 2026)

What this is, in plain words

Counts

Structural decisions (in place of a blueprint)

Questions for James

Per-lesson table

Design-check-sequence records

The key strings

The rules applied (rulings 1–13 of the brief, and the vault)

The documented misconceptions used, and the beliefs deliberately not stated

Checker results, every WARN answered

The recall bank

Sentence-atomise self-check (one row per lesson; the per-paragraph pass was run on every idea line, caption, headache line and script beat before the counts above)

Judgement calls and rule collisions

Owed

The question types (from `TYPES_G5T20.md`)