Topic 27 "Energy from wind, water, sunlight and plants" — your read (2 October 2026)

Two readers answered 119 items cold and agreed every key. Their flags, all applied in v2: nine keys spottable as the only full causal sentence beside short distractors (every key now one clause, every distractor its shape; the key-tell checker reads 0 of 112); the hay-and-cow card's ENERGY chip picked by shape (now FOOD, with the convention said in L04); a houseboat stem over a card whose last box said "the cabin" (re-carded); a typed item whose stem named "bark and chips" so that "bark" was as right as "wood" (the stem now names pieces cut from tree trunks); a solar card whose LIGHT chip left only "the Sun" (re-asked with light-givers as distractors and retagged easy); two bank items that were quiz items with the nouns changed (re-scened); "dam" typed before two stems printed it (the typed item is now last); and wider accept lists ("light", "the Sun's light", "a dam", "dam wall", "heat energy").

Reader C then read the whole v2 bundle, 119 items, and agreed every key. One hedge, fixed in v3: the still brick (does it have any energy?) could be argued either way by a child who had learnt "a cold log still has energy to give"; the key stays yes, the course's rule, and the stem now asks "any energy at all". Reader C's shape notes, all applied: PP-49's key carried a clause the distractors lacked; PP-09's key alone said "any time"; PP-19 offered a street lamp, a real light source; two keys were the only option with "and"; one key the only option with a comma; four keys in a row read C; one stem said "dry cobs" where the option said "corn cobs". Reader C also read Maddox, Maggie and Malia as one child (Maggie is now Ayesha), confirmed the chip words mean the same on every card and that no card description names the box or chip it asks for, and gave three correct answers in other words for each of the six typed items, all of which pass.

The science is right and the chain is taught cleanly four times, the reviewer said. The two findings that mattered crossed topics: Topic 27 coined "energy resource" while Topics 28 and 29 said "energy source", and Topic 27 said "power station" while Topic 28 coins "power plant" (Questions 4 and 5 above). Inside the topic, all applied in v2: the L04 video never spoke "Everything has some energy" or the steam line its quiz keys on (both are in the script now, at 149 words); sixteen real key tells (one-clause keys, distractors in the key's shape); two within-bank twins (re-written); an absolute ("Still water pushes nothing") and two false lines about the wind and a panel (corrected); the attached-question key string and the L01 two-option string (re-spread); the claim string with five No in six (one claim is now true: the wind has energy because it is moving air); three imperatives in L04 ("Burn it", "Cut a tree", "Pick the corn", now "When it burns…"); a heater and a fan that could run on wood-chip electricity (now a boy in the sunshine); the intro pointing at L01's highway (now "tall towers with blades on a hill"); and the reservoir recalled by an item only (one L02 line added). Left as built: "pushes nothing round", "nature keeps giving" wood, "a story for later grades" once per lesson, PP-27's silly distractor.

Clean three-box cards with a blue PUSH arrow and an orange ELECTRICITY arrow, one shape through the topic, the reviewer said; then that the chip sat on a box corner on every card and that on a phone the cards were unreadable (6 px). Seven fixes, all made in v2: the chip above the boxes; the card frame 560 to 424 units and the text 12 to 17 (13 px on a 360 px phone; the desktop card capped at 572 px); every item-card box pale grey (the first-box tint had cued the wind on three cards); the solar card re-asked so its LIGHT chip is data; the houseboat card's "the cabin" renamed; a grey arrow where the chip is the ask (an orange arrow had ruled out "a push" before the child read); the dam redrawn (the pipe slopes from the lake, the wheel sits above the river, the house stands on its own ground). Nine unplaced figures deleted, the four rule cards kept for the videos and dropped from the articles (the rule block carries the words), the summary's four-card strip kept as the video's asset. All 31 code-drawn figures were re-rendered at 900 and 324 px with no text overlap and nothing out of frame, and every page route was screenshotted at 1200 and 360 px.

50 items in content/G4T27_pp100_bank.py: 45 four-option MCQs, four typed words (dam, sunlight, heat, wood) and one two-of-four select. Per atom: EAR4-083 13 · EAR4-084 12 · EAR4-085 12 · EAR4-086 13. Easy 19, medium 20, hard 11, sorted easy to hard and rising with the atom's place in the topic. MCQ keys A 13 · B 13 · C 9 · D 10. Fifteen question types, one exemplar each on the type sheet: what pushes the blades or the wheel; what the turning blades or wheel turn, and where the electricity is made; what carries the energy on; the thing from its job (turbine, dam, panel, water wheel); which thing is the energy resource; how much electricity (none, a little, the same, more) on a still day, with the pipe shut, at night, in fog; the blank box or chip on a drawn source card; the correct reason; which thing works the same way, keeps the lake full, or gets the most sunlight; the sky log; the plants items (what carries energy from logs, the receiver, the steam, a way people get energy from plants); the typed terms; a named child's claim by its correct reason; two ideas chained; the two ways people get energy from plants. Every scene is fresh against the lessons, the quizzes and the practice (the scene-noun grep is in the build record).

Skill: course-build → write-lesson (L01–L03 concept introductions in the fact form, one source each, the name coined last; L04 the capstone in the same form, meeting the belief by name) → write-example-sequence, design-check-sequence, sentence-atomise, write-explanation, write-mcqs (quizzes, attached questions, practice, the PP100 bank and its type sheet); write-video-script (intro, four lesson scripts, summary; the elementary micro-lesson anatomy); review-figures (author self-check on fifty-one renders and five built pages; the non-author pass is owed) @ efd8fba

Grade 4 Topic 27 — Energy from wind, water, sunlight and plants — build record (v1, 2 October 2026)

What this is, in plain words

Four short lessons, one per energy source, each the same story told once more: something in nature pushes or shines, a machine makes electricity (or a log burns), and a carrier takes the energy on to the receiver. Maddox sees the row of tall white towers from the car and asks how moving air can end up as electricity in a lamp (L01: the wind pushes the blades round, the turning blades turn a machine that makes electricity, electricity carries the energy along wires — and the wall is only a stop on the wire, not the maker). Maggie stands on top of a dam and asks how a wall of concrete can make electricity (L02: it cannot; water from the high lake falls through a pipe and pushes a wheel round, the wheel turns the machine; shut the pipe and the still wheel makes nothing). Malia asks how panels that never move can make electricity (L03: sunlight falls on them and they make electricity; at night none, under cloud a little; the panel needs light, not warmth). Then the capstone: Miss Okoro says the logs in the stove and the corn bread are energy resources too, and Malia says a log cannot be — it does not move, it is not hot (L04: everything has some energy; the burning log's heat carries energy to the room; food from a plant has energy that moves to your body when you eat it). Every lesson ends on the same note in plain words — the wind blows again, the river keeps flowing, the Sun rises, new plants grow, so nature keeps giving it — and never says "renewable", which Topic 29 coins.

Counts. 4 lessons · 4 scripts (149, 149, 150, 145 spoken words) + intro (120 words, 2 question marks) + summary (169 words) · 4 attached questions + the intro's poll + 3 summary questions · 47 quiz items (12 + 12 + 12 + 11) · 15 practice items (13 MCQ, 1 typed, 1 written; three Grade 3 / Topic 4 retrievals first; the three two-word terms recognised by MCQ, "dam" offered then typed) · PP100 bank 50 items (45 four-option MCQs, 4 typed, 1 multi-select; EAR4-083 13, EAR4-084 12, EAR4-085 12, EAR4-086 13; easy 18, medium 21, hard 11; MCQ keys A 13 · B 13 · C 9 · D 10) · 51 figures (39 SVG by code, 8 photo placeholders, 4 cartoon placeholders) · checker 0 FAIL, 14 WARN (every WARN answered below) · check_g4_articles.py 0 FAIL (articles 356 / 376 / 291 / 355 words — the three WARNs answered below) · check_svg_ids.py PASS (0 ids written) · names register exit 0 · page builds (/tmp/g4t27.html: 4 lessons, 15 practice, 50 pp100, 51 figures) and all four article routes plus the L01 quiz route screenshotted and read · blind bundle cut (111 MCQ, 6 typed, 1 written, 1 multi; 119 held) · video batch built (6 videos), check_brief.py clean except the INTRO's standing R79 hit, grep -ci strand 0 · NOT sent.

Decisions made without a blueprint

One line each, with the reason:

• Four lessons, one per atom, in register order — the architecture row names four atoms; each payoff is one clause; the capstone (plants) closes.
• One card shape for every hand-over in the topic — boxes left to right, one arrow size, one direction, the carrier named on the chip (PUSH in Topic 12's blue where moving air or water pushes blades; ELECTRICITY / LIGHT / HEAT in Topic 12's orange; the bare ENERGY where the carrier has no name a child owns — food to a body). Topic 12's arrow and box drawers are imported, never redrawn.
• "A machine that makes electricity", never "generator" — what is inside is grades 6-8's; each lesson names the simplification once ("What happens inside that machine is a story for later grades"), in taught words, one sentence.
• "Energy resource" is coined at the end of L01 and carries L02–L04 — the atom titles are "X as an energy resource" and Topic 29's sort needs the category word; it is a phrase, so it is recalled by MCQ (RECALL_BY_MCQ), as are "wind turbine" and "solar panel"; "dam" (three letters) is typed.
• "Nature keeps giving it", never "renewable" — Topic 29 coins renewable on all seven sources; each lesson here ends with the plain sentence for its source.
• The wind is moving air and HAS kinetic energy; it is not energy — Topic 12's sentence word for word; the belief "the wind is energy" is met by Maggie's claim in L01.
• The wall socket is a stop on the wire — ENE-07 (electricity made in the wall) is met in L01's article lines, in Maddox's claim, and again in the practice (Malia's school).
• L02 recalls the old mill — the register's example is "a river turning a wheel inside a dam"; the mill is the visible version of the same push, and Topic 12's spoon water wheel is recalled by one item; the dam's wheel is drawn as a paddle wheel (a different thing from Topic 12's spoon wheel, so a new register entry, never the imported drawer).
• L03 says the panel needs light, not warmth — one line and one item, because children run solar panels together with things that warm in the Sun (Topic 4's bench); no claim item on it, since no catalogued source was found (the rule: no source, test the lesson line plainly).
• L04 does NOT trace the plant's energy to the Sun — that is Topic 34's LIF4-012; here only Grade 3's "A plant does not eat: it makes its own food, using sunlight" and "a tree grows using sunlight" are said, and the plant card draws the Sun's LIGHT arrow to the growing corn without a word about where the wood's energy came from.
• Food's energy "moves from the food to your body" — Topic 4's giver / receiver words carry it; never "food gives you energy" (energy is had or carried, never given).
• The power station that burns plants is one subtitle, three lines — the register's own example ("burning crop waste to make electricity"); the steam pushing a wheel ties it to the topic's one chain without a new mechanism.
• Every lesson gets a video — each is a chain a child should watch run (the blades turn, the water falls, the rays reach the panel, the log burns).
• The intro is one scene (the classroom lights go out in a storm and come back) with two felt questions; it names none of the four coined terms and none of the lessons' scenes.
• The three children are claim-makers more than once each — three names and nine claims; each claim is a different belief on a different scene (Topic 22 took the same call).

Grade 3 and earlier-topic doorways, recalled by one item and one line each, never re-taught: Grade 3 Topic 28 ("Everything you own started as a natural resource"; reservoir) — L01-q1, L02-q1, PR-1; Grade 3 Topic 33 ("A plant does not eat: it makes its own food, using sunlight") — L04's recall line, L04-q1, PR-2; Grade 3 Topic 12 ("Everything has some energy, in different types"; "Electricity carries energy along wires to whatever is plugged in") — L04's line and q2, L01's wires line, PR-3; Grade 4 Topic 4 ("The Sun's light carries energy to …"; giver, receiver) — L03's recall line and q1, L04's giver line and q4; Grade 4 Topic 12 ("Moving air or moving water pushes on the blades of a wheel, so the wheel turns"; "Moving air is a moving thing, so it has kinetic energy. So does moving water") — L01's and L02's recall lines, L01-q2, L02-q2.

The simplifications, named: "a machine that makes electricity" for the generator (said once per lesson as a story for later grades); "the panel makes electricity when light falls on it" with no mechanism (said once); "the heat boils water, and the steam pushes a wheel round" for a steam turbine (no "turbine" said of it); the wood's and the food's energy not traced to the Sun (Topic 34's).

Questions for James (the build does not wait on them)

• Should "energy resource" be coined here, or left for Topic 29? Context: the atom titles say "X as an energy resource" and the four lessons need a word for what the wind, the water, the sunlight and the plants have in common; it is coined at the end of L01 ("A thing in nature that people get energy from is called an energy resource") and carried by one line per lesson, one recognition item per quiz, and the bank's type 5. Recommendation: keep — without it, L04's capstone sentence "Plants are an energy resource" has no word. Built with it; dropping it is one lexicon line, four article lines and four items.
• Is one line on "the panel needs the light, not the warmth" enough, or does the solar-thermal muddle deserve a claim item? Context: children run solar panels together with things that warm in the Sun; the catalogue has no row, so the rule says test the lesson line plainly (L03-q9, PP-43) rather than invent a belief. Recommendation: keep as built; add a claim item only if Olivia or a blind reader sees the muddle. Built plainly.
• Do L01 (356 words), L02 (376) and L04 (355) stand at their length? Context: the brief allows above 300 with a subtitle or figure every eight lines and a reason; the longest run of idea lines without one is 4 (L01), 4 (L02), 3 (L04); each section feeds an item (the wire into the ground and the wall; the mill; the shut pipe; the power station). Recommendation: keep; a split would make a fifth lesson for a fact-form atom. Built as one each.

Design-check-sequence records

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Skill: design-check-sequence @ efd8fba

Part: L01 (EAR4-083)

Type: (a) one-step fact — what pushes, what turns, what carries; the answer is one thing.

Plan: recall natural resource (3 opt, 0) → recall the pinwheel (3 opt, 1) → what pushes the blades (3 opt, 2) → what the blades turn (3 opt, 1) → the term wind turbine (3 opt, 0) → the carrier (3 opt, 2) → Maddox's claim: the wall socket (no) → the still morning (none, A) → Maggie's claim: the wind is energy (no) → the ferry card (3 opt, 1) → the windy night (yes) → the term energy resource (3 opt, 0). Two-option string B A B A; three-option 0 1 2 1 0 2 1 0.

Belongs in practice/test instead: the four-way fixed sets; the ordered how-much set; the reason items; the cards with a blank chip (PP types 1–3, 5–8).

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Skill: design-check-sequence @ efd8fba

Part: L02 (EAR4-084)

Type: (a) one-step fact with one typed term.

Plan: recall reservoir (3 opt, 0) → recall the spoon wheel (3 opt, 1) → what pushes the wheel (3 opt, 2) → what the wheel turns (3 opt, 0) → the term dam (3 opt, 1) → TYPED dam → Maggie's claim: the still lake (no) → the shut pipe (none, A) → the mill-and-dam why (3 opt, 1) → the town card (3 opt, 2) → the camp stream's resource (3 opt, 0) → the forty-years why (3 opt, 1). Two-option string B A; three-option 0 1 2 0 1 1 2 0 1.

Belongs in practice/test instead: the typed dam on a fresh river; the four-way sets; the "what would stop a dam" reason; the keeper of the lake (PP types 1–2, 4–9, 12).

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Skill: design-check-sequence @ efd8fba

Part: L03 (EAR4-085)

Type: (a) one-step fact with the near misses (night, cloud) as its fluency.

Plan: recall the Sun's light (3 opt, 0) → what the panel makes (3 opt, 1) → the term solar panel (3 opt, 2) → Maddox's claim: light but no energy (no) → night (none, A) → cloud (less, 2) → does anything turn (no) → the carrier (3 opt, 0) → what the panel needs (3 opt, 1) → the houseboat card (3 opt, 2) → which day (3 opt, 0) → nature keeps giving it (3 opt, 1). Two-option string B A B; three-option 0 1 2 2 0 1 2 0 1.

Belongs in practice/test instead: the ordered how-much set on fog and night; the sky log; the sunniest place; the noon-against-sunset reason; the storing claim; winter against summer; typed sunlight (PP types 3–4, 6–10, 12–14).

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Skill: design-check-sequence @ efd8fba

Part: L04 (EAR4-086)

Type: (c) concept understanding — the capstone; two faces of one source and a documented belief.

Plan: recall the plant (3 opt, 0) → recall everything has some energy (yes) → the WHAT: heat (3 opt, 1) → the WHAT: the giver (2 opt, B) → Maggie's TRUE claim: cold firewood has energy to give (yes) → the WHY: why plants are a resource (3 opt, 2) → the power station (3 opt, 0) → the tent card (3 opt, 2) → the new trees why (3 opt, 0) → the corn-cob transfer (3 opt, 1) → who gets energy from a plant (3 opt, 2). Two-option string A B A; three-option 0 1 2 0 2 0 1 2.

Belongs in practice/test instead: typed heat and wood; the claims as reason items; the set; the refilled wood pile; the snack traced to plants (PP types 7, 11–15).

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The key strings

• Attached questions in video order (L01, L02, L03, L04, summary 1–3): A B A B A B A — A 4 of 7 (57 %).
• Lesson quizzes, two-option items: L01 B A B A · L02 B A · L03 B A B · L04 A B A — no four in a row alternate within a lesson; no position above 60 %.
• Three-option items: L01 0 1 2 1 0 2 1 0; L02 0 1 2 0 1 1 2 0 1; L03 0 1 2 2 0 1 2 0 1; L04 0 1 2 0 2 0 1 2; practice three-option 0 1 2 0 0 2 0 1 0 0 1 2 (0 holds 6 of 12 = 50 %), two-option B.
• PP100 MCQ keys: A 13 · B 13 · C 9 · D 10 (45 MCQs); the four typed items and the multi-select carry no letter.
• Claims: five in the quizzes (L01 2, L02 1, L03 1, L04 1) plus one in the practice; one is keyed yes (L04-q5, Maggie's TRUE claim); No carries 4 of 5 quiz claims — above the 70 % line, recorded here: the L01–L03 beliefs (the wall socket, the wind is energy, the still lake, light but no energy) have no honest true twin that is not the lesson's own rule.
• Order convention: no order item in this topic. Lettered drawings: none (every item card names its boxes in words, so no letter can point at two things).

The example sequences, written out

L01 (one chain, examples only; the still day is the near miss): the wind pushes on the three long blades, so the blades turn · the turning blades turn a machine inside the top of the tower, and the machine makes electricity · electricity carries energy along wires to whatever is plugged in; the wall is only one stop along the wire · on a still day no moving air pushes the blades, so the blades stay still, and the tower makes no electricity · the names: wind turbine; energy resource. Rule: The wind pushes the blades of a wind turbine round, and the turning blades turn a machine that makes electricity. A thing in nature that people get energy from is called an energy resource.

L02: the river pushed the mill's wooden wheel round · water from the high lake falls through a big pipe inside the wall; the falling water pushes on the blades of a wheel, so the wheel turns · the turning wheel turns a machine that makes electricity · the pipe shut: no water moves past the wheel, so the wheel stays still; the still lake pushes nothing round; the wall makes no electricity · the name: dam · rain, streams, the river keep the lake full. Rule: Moving water pushes the blades of a wheel inside a dam round, and the turning wheel turns a machine that makes electricity. The river keeps flowing, so nature keeps giving this energy resource.

L03: the Sun's light carries energy to whatever it falls on · sunlight falls on the panel; the panel is a machine that makes electricity when light falls on it; nothing inside it turns · the electricity carries energy along a wire into the house · night: none; cloud: a little; the table · the cold winter panel: light, not warmth · the name: solar panel. Rule: When sunlight falls on a solar panel, the panel makes electricity, and the electricity carries energy along wires into the house. At night no sunlight falls on the panel, so the panel makes no electricity.

L04: a plant makes its own food, using sunlight; a tree grows using sunlight, and so does corn · the log burns, and its heat carries energy to the room · everything has some energy, in different types; a cold log still has energy to give · the corn bread has energy; when Maggie eats it, that energy moves from the food to her body (giver, receiver) · a power station burns wood chips and corn stalks; the heat boils water, and the steam pushes a wheel round · new trees, new corn. Rule: Plants are an energy resource. Wood from a tree burns, and its heat carries energy to the room. Food from a plant has energy, and that energy moves to your body when you eat it.

The rules applied

Misconceptions confronted, by name

Checker result, every WARN answered

python3 build_tools_check_topic.py grade4/topic27_build/content/G4T27.py → 0 FAIL, 14 WARN (S30-COUNTS typed=6 fail=0 warn=0; S35 typed_long=0; S36-COUNTS unusual_words=5; S37 strand=0; S38 fragments=0; S39 hits=0; S29 0).

• S8 beat carries 3–5 sentences (×6): kept — the elementary micro-lesson's beats are one scene each with short sentences (Topic 22's record says the same); each beat is ≤ 48 words and the scripts are 149 / 149 / 150 / 145 spoken words.
• S34 'natural resource' has no recognition or recall: by design — Grade 3 Topic 28's coined term, listed in terms for the glossary and RECALLED by L01-q1 and PR-1 (the resource behind a product), never re-coined; it is not in coined_at.
• S34 'giver' / 'receiver' no recognition or recall: by design — Topic 4's words, recalled by L04-q4 and PP-37 (which thing is the giver / the receiver) and one L04 line; not re-coined.
• S36 unusual words (5), one line each: concrete ×11 — fine, the everyday US word for what a dam is made of, in the headache and the distractor "the concrete wall"; stalks ×4 — fine, "corn stalks" is the farm word for the plant's stem and the register's "crop waste" in plain words; ferry ×2 — fine, an everyday US boat in a fresh item scene; socket ×2 — fine, left only in the bank distractor "a wall socket" and its why (cut from every stem); trailer ×1 — fine, an everyday US home in Alaska. Swapped before this record: ridge → hill; flicker → cut; paddles → blades (one word for one thing); crackles → makes a sound; hiker → a girl walking in the hills.
• check_g4_articles.py: L01 356, L02 376 and L04 355 words above the 300 WARN line — kept with the reason in Question 3 (L01 has 7 figures and 6 subtitles, longest run of idea lines without one 4; L02 7 and 5, longest run 4; L04 9 and 6, longest run 3); L03 is 291.
• check_brief.py: every video ✓ except the INTRO's standing R79 hit (an intro has no rule slide and no bullets; accepted on every topic); the intro carries 2 question marks (under the limit).
• S13 'the oatmeal' / 'the corn cobs' in a stem (two hits on the first run): fixed — the oatmeal item's options became "Maddox's body / the food"; the cobs item's stem says "dry cobs" and the key "the corn cobs".

Bank freshness, re-performed

Scene nouns of every lesson, quiz, attached and summary item (68: car, highway, dad, Texas, walkway, Tennessee, mom, concrete, front steps, neighbor, cabin, corn bread, stove, Kansas, Georgia, fan, pinwheel, Oklahoma, Iowa, Wyoming, Nebraska, Montana, ferry, island, reservoir, faucet, spoon, Idaho, Oregon, Kentucky, camp, stream, Colorado, slide, school roof, Utah, barn, Ohio, Florida, houseboat, Nevada, garden lamp, sunflower, brick, Vermont, oatmeal, firewood, wood chips, Maine, corn cobs, apple, shirt, oak, heater, ranch, South Dakota, bus stop, baker, Michigan, Alaska, storm, classroom, Washington, Arizona, shed, soup, rice, midnight) grepped against the bank and the practice. Hits that were SCENE reuse with a noun changed, and what was done: a turbine "beside a highway in Illinois" (L01's highway) → "at the edge of a town"; "a wind turbine in Texas, still all morning" (L01-q8's Nebraska still morning) → limp flags at a Texas wind farm all afternoon; "a farm in Iowa" (L01-q4's Iowa tower) → Indiana; "a wind turbine in Oklahoma" (L01-q3) → Ohio; "a lake in Montana" (L02-q8's Montana pipe) → North Carolina; "the pipe inside a dam in Oregon" (L02-q4) → Virginia; "a school roof in Arizona" (L03-q2's school roof) → a library roof in Oklahoma; "thick cloud over a house in Washington" (L03-q6's Ohio cloud) → thick fog; "the barn's lights" card (L03-q5's barn) → the garage's lights; "a power station in Florida burns wood chips" (L04-q7's Georgia wood chips) → corn stalks and straw; "a power station in Georgia burns chips" (typed wood) → a paper mill in Alabama burning bark and chips; "a stove in a cabin in Minnesota" (L04's cabin stove) → the stove of a bakery; "a solar panel on a cabin in Vermont" → a road sign; the practice's "wind turbines in Kansas" (the L01 attached) → North Dakota; "a tower in Oklahoma" → Missouri; "a river in Idaho" (L02-q3) → Pennsylvania; "a cabin roof in Alaska" → a trailer roof. Hits that remain are content, not scenes: concrete (the distractor "the concrete wall"), stove ×14 (the device for burning wood — the thing itself, as Topic 22's shaking table; the bank's stoves are a bakery's, a claim's and a card's, never the cabin), fan (the option "turning on a fan"), wood chips (the lexicon's own power-station line in a why), state names on different scene kinds (Colorado hill vs Colorado camp stream; Nebraska dam vs Nebraska still morning; Michigan roof vs Michigan baker). No bank item now reuses a taught scene with a noun changed.

Blind-text grep

grep -h '^\[Drawing:' grade4/topic27_build/blind/2026-10-02/BLIND_BUNDLE_G4T27.md | grep -iE 'energy|carries|electricity|keeps giving' → 7 hits, each explained: every hit is the word ELECTRICITY as the second arrow's chip on a card whose BLANK is a box or the first chip (the ferry card: "?" box, chips PUSH; ELECTRICITY — the answer is the wind turbine; the town card and the ranch / island cards: "?" first box — the answer is moving water / the moving air; the city card: "?" middle box — the wheel inside the dam; the houseboat card: chips "?; ELECTRICITY" — the answer is LIGHT; the garage card: "?" first box — the Sun). In none of the seven is ELECTRICITY the thing asked for; it is the drawn data a reader needs to place the card in its chain. The factory card, whose blank IS the electricity chip, prints "arrows left to right: PUSH; ?" — 0 hits. No blind line carries "carries", "energy" or "keeps giving". The twelve drawing lines are listed in the bundle; "wind turbine", "the wheel inside the dam" and "the solar panel" appear only where they are drawn boxes, never where they are the blank.

Figures (author self-check on the renders; the non-author review-figures pass is owed)

Rendered all 51 to /tmp/g4t27_figs/ and viewed every one on six contact sheets plus fourteen at native size; then the four built article pages and the L01 quiz page at 800 px. Fixed on the render: the turbine's blades and motion arc ran out of the frame (tower 170 → 125, the arc now inside; the machine label moved to a leader on the right, clear of the blades); the dam's wheel sat in the river band and the MOVING WATER chip covered the pipe (the frame grew to 280, the wheel moved up onto a drawn shaft to the machine, the chip sits above the pipe); the panel's "wire" label sat on the wire (moved beside it); the plants rule card's third line overran its 460 frame (card widened to 560). Guards: Topic 18's table asserts every cell fits its column (the sun-panel table and the sky log pass); the module writes no SVG ids. Each placeholder shows its note; captions never say "real".

Names run

python3 build_tools_names.py Okoro Maddox Maggie Malia → Okoro free · Maddox free · Maggie free · Malia free, exit 0. No other character name appears (the neighbor, the dad, the mom, the baker, the farmer, the girl walking and the camp cook are unnamed); places are real US places.

Sentence-atomise self-check (one table per paragraph, collapsed to the rows that changed)

Judgement calls

• "Energy resource" coined here — Question 1.
• The solar-warmth muddle tested plainly, not as a claim — Question 2 (no documented source; the rule says do not invent a belief).
• Three articles above 300 words — Question 3.
• The wind's energy said as Topic 12 said it ("moving air has kinetic energy") rather than "the wind carries energy" — the wind is a thing, not a carrier; a push hands energy over (Topic 5's collision sentence), so the card's first arrow is PUSH, not a carrier chip.
• "A machine that makes electricity" in every chain — the register's cross note sends the generator to grades 6-8; the batch builder's bar list already bans "generator".
• The dam's wheel drawn as a paddle wheel, not Topic 12's spoon wheel — a different thing (a wheel inside a dam) gets its own register line; Topic 12's primitives (arrow, box, motion arc) are imported.
• The food card's chip is the bare ENERGY — a child owns no carrier word for food's energy, and "chemical energy" is a later grade's; Topic 4's own card used "an arrow marked energy".
• The how-much set in words (none / a little / the same / more) — the topic measures nothing, so there are no numbers to state; the lesson's table uses the same words.
• The No-keyed claims above 70 % — one TRUE claim built (L04-q5); the L01–L03 beliefs have no honest true twin that is not the rule itself.
• "Stove" kept in fourteen bank strings — the device, not the cabin scene; the cabin itself appears nowhere in the bank.
• Fifteen types on the type sheet — above the "about ten" ceiling because four sources each need the push / turn / carrier forms and the capstone needs the claim, set and two-step forms; merging them would hide moves James reads separately.

Owed

• Blind review of blind/2026-10-02/BLIND_BUNDLE_G4T27.md (119 items held; the keys file is sequestered) by a reader who has not seen the keys; the six adversarial rows for the typed items.
• The non-author review-figures pass over the 39 SVG renders and the 12 placeholders' briefs; review-questions and review-lesson passes; review-accuracy on the dam's chain (pipe → wheel → machine), the panel's light-not-warmth line, the paper-mill bark and the biomass power stations.
• The picture pass (David's pack) on the 8 photo and 4 cartoon placeholders — after James's sign-off, since this record carries Questions for him.
• The video batch (handoff/G4T27/videos/batch_G4T27.json, READY.md written by the batch tool) is NOT sent.
• Nothing committed.

v2 — reviews applied (2 October 2026)

Skill: course-build → write-lesson → write-video-script (L04 beats 1 and 3), write-mcqs (every item change; the key-tell checker to 0), write-explanation (fb and why lines), review-figures (author re-render after every drawer change; the built page read at 1200 and 360 px) @ fb37d14

In plain words. The three reviews found the topic's science sound and its shape soft in four places, and all four are fixed. (1) The item cards are now built for a phone: the frame shrank from 560 to 424 units and the text grew to 17, so a nine-year-old reading on a 360 px phone sees 13 px letters instead of 6; the carrier chips ride above the boxes instead of sitting on a corner; every item-card box is the same pale grey, so no tint whispers the answer; and where the chip is the thing asked, its arrow is grey, so the arrow's colour cannot rule an option out. (2) Eighteen keys that a reader could spot by length or shape are now the same shape as their distractors (the key-tell checker reads 0 of 112). (3) The L04 video now says the two lines its quiz leans on ("Everything has some energy"; the heat boils water and the steam pushes a wheel), so a video-only learner can answer L04-q2, L04-q7, PP-38 and PP-46. (4) The words: Topic 27 never names the big building that burns wood chips (Topic 28 coins "power plant"), keeps "energy resource", and puts FOOD on the eater arrow — Grade 4's one word for that hand-over, as Topic 34 prints it. Two coordinator additions landed in the same pass: the FOOD convention, and a compact=True form of the source card that Topics 34 and 35 can import in place of their own chain_card.

Finding → change, every row

Checker lines

• python3 build_tools_check_topic.py grade4/topic27_build/content/G4T27.py → 0 FAIL, 14 WARN (S30-COUNTS typed=6 fail=0 warn=0; S35 typed_long=0; S36 unusual_words=4: concrete ×11, ferry ×2, socket ×2, trailer ×1 — as v1 answered them; S37 strand=0; S38 fragments=0; S39 hits=0; the seven S8 multi-sentence beats and the three S34 earlier-topic terms as v1 answered them).
• python3 grade4/check_g4_articles.py … → 0 FAIL; scripts 149 / 149 / 150 / 149, intro 120, summary 169; articles 356 / 393 / 291 / 381 words (L02 +17 for the reservoir line, L04 +26 for the FOOD line and the building line; the three WARNs stand on Question 3's reason).
• python3 ~/Documents/CourseBuilding-Vault/skills/write-mcqs/check_key_tells.py grade4/topic27_build/content/G4T27.py → KEY TELLS: 0 of 112 MCQs flagged (a: 0, b: 0, c: 0) (46 keys are the longest by some margin; 19 fixed-set options exempt).
• python3 build_tools_names.py Okoro Maddox Maggie Malia → all four free, exit 0.
• python3 ~/Documents/CourseBuilding-Vault/skills/review-figures/check_svg_ids.py grade4/topic27_build/content/figures.py → figures read: 43 ids found: 0 ids shared: 0 RESULT: PASS.
• Renders: all 31 SVG keys plus the two compact demos rendered through headless Chromium at 900 px and 324 px (/tmp/g4t27_v2_figs/); the bounding-box pass reports 0 out-of-frame, 0 text overlaps; opened and read: card_wind, q_card_panel_carrier (phone), pp_card_hay (phone), dam_moving (three takes), dam_shut, turbine_wind, panel_day, panel_night, stove_diag, table_sun_panel (phone), cards_four, demo_compact4 (two takes).
• Built page: python3 build_tools_build_topic_site.py grade4/topic27_build/content/G4T27.py /tmp/g4t27_v2.html → 4 lessons, 15 practice, 50 pp100, 43 figures; every article, quiz, practice, PP100 and summary route screenshotted at 1200 and 360 px (/tmp/g4t27_v2_pages/, 0 tiny SVGs) and every figure and item-with-drawing captured as its own element at both widths (/tmp/g4t27_v2_elems/, 100 shots); opened and read: L03-q10 (phone), PP-19 and PP-35 (phone), the L02 dam (phone), the L04 FOOD card (phone), the L03 table (phone), the L01 wind card (desktop). The card text measures 13 px on the phone shots; the desktop card is capped at 572 px.
• Video batch: python3 build_tools_video_batch.py … → 6 videos, key string A B A B B B A (B 4 of 7); check_brief.py → L01–L04 and SUMMARY ✓, INTRO the standing R79 line; grep -ci strand 0; "power station / power plant" 0. Not sent.
• Blind bundle v2: python3 build_tools_blind_bundle.py … grade4/topic27_build/blind/2026-10-02-v2 → 111 mcq, 6 text, 1 frq, 1 multi, 119 held, 6 adversarial rows; its 12 [Drawing: lines grepped for each card's own asked word (wind turbine / moving air / moving water / wheel inside the dam / the Sun / LIGHT / HEAT / the room / FOOD / ELECTRICITY on the factory card / the sky log's verdict) → 0 hits.

Key strings (v2)

• Attached + summary, video order: A B A B B B A (was A B A B A B A).
• Two-option: L01 B A A B (was B A B A) · L02 B A · L03 B A B · L04 A B A. Three-option: L01 0 1 2 1 0 2 1 0 · L02 0 1 2 0 1 1 2 0 1 · L03 0 1 2 2 0 1 2 0 1 · L04 0 1 2 0 2 0 1 2; practice three-option 0 1 2 0 0 2 0 1 0 0 1 2, two-option B.
• Claims (yes = A): L01-q7 N · L01-q9 Y · L02-q6 N · L03-q4 N · L04-q5 Y · PR-9 N — No 4 of 6 (67 %, under the 70 % line).
• PP100: MCQ keys A 13 · B 13 · C 9 · D 10 (unchanged); easy 19 / medium 20 / hard 11 (PP-29 → easy); per atom 083 13 · 084 12 · 085 12 · 086 13; monotonic order holds.

Changed items

L01-q9, L01-q11 · L02-vq1, L02-q6 (moved to q12; q7–q12 → q6–q11), L02-q10 fb, L02-q11, L02-q12 · L03-vq1 fb, L03-q10 (stem, card) · L04-q1, L04-q4, L04-q5 fb/why, L04-q6, L04-q7, L04-q9, L04-q11 · summary Q1 · PR-2, PR-4, PR-10, PR-14 accept · PP-02, PP-04, PP-19 (old PP-29; renumbering PP-19…28 → PP-20…29), PP-22, PP-26, PP-28, PP-36, PP-38, PP-39, PP-40 accept, PP-41 accept, PP-42, PP-44 accept, PP-45, PP-46, PP-47, PP-49 why, PP-50.

Judgement calls in this pass

• pp_card_panel_in keeps its LIGHT chip. The review offered "blank the chip or re-ask the item"; the item is re-asked (light-givers as distractors), which turns the chip from an elimination into the card's data — blanking it too would make one item ask two things.
• PP-47 took parallel distractors, not the review's key alone, because the review's key still tripped the length test; the move (the receiver taken for the giver) is unchanged.
• PP-45 treats "bark", "trees" and "logs" as near misses with their own lines, not as accepted answers: the stem now names only pieces of trunk, and "logs" names the pieces where the stem asks for the stuff.
• L04's script shortened beats 2 and 4 to fit the review's beats 1 and 3 under 150 words; Grade 3's plant sentence is kept word for word, the rule beat untouched.
• The row-turning arrow in the compact card is two straight segments and Topic 12's arrow for the last drop — never a new arrow glyph — so Topics 34 and 35 inherit the depiction unchanged.
• Nothing committed; the batch is built and checked but not sent; the picture pass still waits on James's three questions above.

v3 — polish (2 October 2026)

Skill: write-mcqs (every item change; the key-tell checker held at 0; typed accepts confirmed) → write-explanation (the fb and why lines that moved) → write-like-james (the Needs-you page, REVIEW_NEXT_G4T27.md) @ e23b67f

In plain words. Reader C read the whole v2 bundle cold (119 items) and agreed every key; the one hedge was the still brick (L04-02), where a careful child who had learnt "a cold log still has energy to give" could defend either answer. The key stays "yes" (the course's rule, Grade 3 Topic 12: "Everything has some energy, in different types"), and the stem now asks it so that "yes" is the only honest reading: "Does the brick have any energy at all?" Reader C's shape notes are all applied; the three children are no longer three Ma- names (Maggie is now Ayesha); and the phrase the quiz stems lean on, "source card", is now said on the page under each lesson's card. Nothing else moved: keys keep their letters and meanings.

Changed, by id

Terms the items lean on, where each is said

• natural resource — Grade 3 Topic 28's coined term (its title is "Using and conserving natural resources"); recalled here by L01-q1 and PR-1 and listed in terms for the glossary; never re-coined.
• giver / receiver — coined in Topic 4, recapped in Topic 12 ("a named carrier carries energy from a giver to a receiver"); said here in L04: "The corn bread is the giver, and Ayesha's body is the receiver." and tested by L04-q4 and PP-37.
• carrier — Topic 12's lexicon: "A carrier is the thing that carries energy, such as electricity or heat."; here only as L01-q12's distractor and its fb.
• reservoir — L02, "Inside the dam" (added in v2): "The lake behind the wall is a reservoir: a big lake that people made to store water."; recalled by L02-q1.
• steam — L04, "Burning plants to make electricity": "The heat boils water, and the steam pushes a wheel round."; spoken in the L04 script's beat 3; tested by L04-q7 and PP-38.
• source card — was in no lesson line; now in the four captions above.

Gates (v3)

• python3 build_tools_check_topic.py grade4/topic27_build/content/G4T27.py → 0 FAIL, 14 WARN (the same fourteen as v2: seven S8 multi-sentence beats, three S34 earlier-topic terms, four S36 words — concrete ×11, ferry ×2, socket ×2, trailer ×1; S38 fragments=0; S30 typed=6 fail=0 warn=0; the L04-10 S13 hit cleared by naming every option in the stem).
• python3 grade4/check_g4_articles.py … → 0 FAIL; scripts 149 / 149 / 150 / 149; intro 120; summary 169; articles 356 / 393 / 291 / 381 (the three WARNs stand on Question 3).
• python3 build_tools_build_topic_site.py … /tmp/g4t27_p.html → 4 lessons, 15 practice, 50 pp100, 43 figures.
• check_svg_ids.py → figures read 43, ids found 0, PASS.
• check_key_tells.py → KEY TELLS: 0 of 112 MCQs flagged (a: 0, b: 0, c: 0).
• build_tools_names.py Okoro Maddox Ayesha Malia → exit 0.
• Video batch rebuilt: 6 videos, key string A B A B B B A; check_brief.py L01–L04 and SUMMARY ✓, INTRO the standing R79 line; "Maggie" 0, "strand" 0. Not sent.
• Blind bundle v3: grade4/topic27_build/blind/2026-10-02-v3/ (111 mcq, 6 text, 1 frq, 1 multi, 119 held, 6 adversarial rows). Per-card check of the 12 [Drawing: lines against each item's own key → 11 clean; PP-32's key is a time ("10 at night") and the sky log must print its four times as data (its verdict, none, is not printed).
• Nothing committed.

Skill: course-build → review-lesson (Role A blind key read, two readers; Role C adjudication by the coordinator) @ 80719f4

Topic 27 — Energy from wind, water, sunlight and plants — blind read, 2 October 2026

Every key agreed by two blind readers (119 items each; MCQ disagreements 0 for both; PP-48 multi A, B matched; the six typed answers on the lists; the FRQ model in the key's words). The science reads clean. Both readers' main weakness is the same: in nine items the key is the only full causal sentence beside short or absurd distractors (the key-tell checker flags 18 of 112). The intro poll is not bundled by design.

Flags carried into the fix pass

Readers' files: blind/2026-10-02/READER_A.md, READER_B.md.

Skill: course-build → review-lesson (Roles B, B2) · review-questions · review-accuracy @ 80719f4 — non-author review, filed by the coordinator from the reviewer's report

Topic 27 — guidance, questions and accuracy review, 2 October 2026

The science is right and the chain is taught cleanly four times. The two things that matter are cross-topic: Topic 27 coins "energy resource" while Topic 29 says "energy source" 64 times and Topic 28 three times; Topic 27 says "power station" while Topic 28 coins "power plant" and Topic 29 says "power station" 30 times. Inside the topic: L04's video never says "Everything has some energy" or the steam-pushes-a-wheel line, so a video-only learner cannot answer L04-q2, L04-q7, PP-38 or PP-46; the L03-10 card says "the cabin" under a houseboat stem; the key-tell flags are real (16 of 18); PP-01/02 and PP-03/04 are within-bank twins. Re-performed: scripts 149/149/150/145, intro 120, summary 169, articles 356/376/291/355 (longest idea run ≤5); bank 13/12/12/13 per atom, keys A13 B13 C9 D10, one true option each; checker 0 FAIL / 13 WARN.

Coordinator's ruling on the cross-topic words (applied without asking James; recorded on the Needs-you page): "energy resource" everywhere on Topics 27, 28 and 29 (the register's name; Topic 29's L01 opens "An energy resource is a thing in nature that people get energy from."). "Power plant" is the US word and Topic 28 coins it; Topic 27 says "a big building that burns wood chips to make electricity" (no name), Topic 29 says "power plant". The Topic 28 and 29 fix passes carry their halves.

Key-tell checker: KEY TELLS: 18 of 112 MCQs flagged (a: 16, b: 9, c: 1) — 16 real; L04-q4 (c) is a proper-noun false positive; L04-q1 / PR-2 are Grade 3's recall sentence (equalise the distractors).

Author's three questions: (1) keep "energy resource" — yes, with the cross-topic change above; (2) keep the plain "light, not warmth" line and item — yes; (3) keep the three long articles as one each — yes; move dam_photo up one line in L02.

Blind-read rulings: PP-36: state the bare-ENERGY convention on the page and make the options four chip words. L03-10: re-card ("the houseboat"). PP-45: re-stem so "bark" is not right. PP-29: distractors become tempting light-givers. Reservoir: add the L02 line.

Essentials

• E1 cross-topic words (above).
• E2 L04 video–article parity: "Everything has some energy" and the steam line into the script.
• E3 L03-10 stem (houseboat) and drawing (the cabin) disagree.

Worth fixing

W1 16 key tells (rewrites below). W2 PP-01≈PP-02, PP-03≈PP-04 twins. W3 L02-q10 fb "Still water pushes nothing." (FOR-03 absolute); L03 vq fb and L03-q10 fb "the wind pushes nothing on a solar panel" / "nothing pushes a solar panel" are false. W4 attached + summary key string A B A B A B A; L01 two-option string B A B A. W5 L02 typed "dam" at q6 while q3/q4 print it. W6 claim string N N N N Y N — make L01-q9 TRUE. W7 L04 imperatives ("Burn it", "Cut a tree", "Pick the corn"). W8 L04-q11 heater and PP-39 fan defensible via L04-q7. W9 intro names L01's highway. W10 PP-29, PP-36, PP-45, reservoir line.

Leave

"Pushes nothing round" (accurate, Topic 12's twin); "nature keeps giving" wood (Topic 29 carries the rate condition); "a story for later grades" once per lesson; card_plant_grows caption; PP-27's silly distractor; Grade 3 punctuation in the plant sentence.

Skill: review-figures @ 80719f4 — non-author figure review with the page pass, filed by the coordinator from the reviewer's report

Topic 27 — figure review, 2 October 2026

What a student notices first: clean three-box cards with a blue PUSH arrow and an orange ELECTRICITY arrow, one shape through the topic — then that the ELECTRICITY chip sits on the corner of the right-hand box on every card. On a phone the cards are unreadable (12-unit text in a 560-unit frame shows at 6 px).

Must fix before a cold read

1. Chip over box, every three-box card (16 keys + cards_four). ELECTRICITY chip overlaps the right box by 5.3 units over its 18-unit height; NO LIGHT / NO ELECTRICITY on card_sun_night by 15. Fix in source_card: gap 74 → ~100 or dy=-42.
2. Phone legibility. Card text 6.0 px at 360 px wide; dam and turbine labels 5.5 px; tables 6.5 px. L01-10, L02-10, L03-10, PR-4, PP-19/20/23/29 cannot be answered on a phone. Fix in the drawers (box/chip size 12 → 15–16, labels 11 → 13), not per figure.
3. Item-card first-box tint cues or misleads. q_card tints the first box COOL whatever it holds: q_card_ranch and pp_card_sail_in cue the wind; pp_card_panel_in mis-cues toward the wind when the key is the Sun; "the Sun" sits in a blue box where card_sun draws it peach. Fix: item-card boxes all PALE.
4. PP-29 (pp_card_panel_in) hands over its key — LIGHT chip into "the solar panel" leaves only "the Sun". Blank the LIGHT chip too, or ask for the carrier.
5. L03-10 (q_card_panel_carrier): last box "the cabin", stem "houseboat". Rename the box.
6. Blank-chip arrows keep their colour. On q_card_panel_carrier, q_card_log_carrier, pp_card_hay, pp_card_turbine_out the orange arrow rules out "a push" before the student reads. Draw the arrow MID grey when the chip is the ask.
7. dam_moving / dam_shut / dam_headache: the wheel's lower paddles sit in the river, the house stands in the river band, the pipe is flat while the caption says it falls. Raise the pipe and wheel ~20 units, end the river before the house, slope the pipe.

Page pass

Built and opened L01–L04 article, L01–L04 quiz, practice, PP100 and summary at 1200 and 360 px. Every figure renders on the page as alone; placeholders show their notes; blind comments stripped. check_svg_ids.py: 51 figures, 0 ids, PASS. Verdict: PASS on desktop; FAIL at phone width (item 2). Each article prints the rule three times (rule block, rule_card, caption) — drop the rule_card from the article.

Unplaced keys (9)

card_wind_headache, turbine_headache, dam_headache, panel_headache, card_sun_night → delete. q_card_mill, q_card_oats, q_card_panel_box → delete (or swap q_card_panel_box in for L03-10). cards_four → keep as the summary video's asset, not a page figure.

Convention check

Source left, device middle, one arrow size and direction: yes. PUSH where a push hands energy, ENERGY-colour elsewhere: yes; the food card's bare ENERGY chip does not break it. Imports as drawn; the thin wind arrows and pipe arrows are hand-drawn (import-rule minor). Captions never say "real". Blind/alt on all 14 item cards list boxes and chips only. Briefs complete; none states the one thing the eye must land on first (add at the picture stage).

Minor

turbine "wires" label 0.8 units out of frame; panel_day leader ends on the roof 3 units above the panel; panel_night chip covers the moon; dam MOVING WATER / PIPE SHUT chip lies across the wall; "the lake behind the dam" sits in the sky; dam water hits the wheel at axle height.

Best: turbine_wind; panel_day/night pair; table_sun_panel. Weakest: dam_moving; the three-box item cards; pp_card_panel_in.

Skill: review-lesson @ e23b67f — Role A (blind key reader), Reader C, cold read of BLIND_BUNDLE_G4T27.md (v2) only.

Takeaway

The bank reads cleanly for a Grade 4 student: every item has one option I would pick, the chip words (PUSH, ELECTRICITY, LIGHT, HEAT, FOOD) mean the same thing on every card, and no card description names the box or chip it asks for. Three things I would fix before shipping. L04-02 (does a still brick have energy?) has two defensible answers — the topic teaches that a cold log "still has energy to give", so a careful child says yes, while the lesson's likely contrast case says no; the stem needs "energy to give". PP-49's key is longer than its neighbours by a clause ("as they grow"). And the three claim-makers are Maddox, Maggie and Malia — three M-a names a nine-year-old reads as one child. Minor: L02-11 and L04-06 keys are the only option with "and"; PP-09's key is the only option without "only"; PP-33 to PP-36 key C four times running; PP-19's "a street lamp" is a second light source.

Items

Cross-item notes

• Names: Maddox (L01-07, L03-04, L04-04, PP-46), Maggie (L01-09, L02-06, L04-05, PP-47), Malia (PR-09, PP-42) — three names starting Ma-, two of five letters. Rename Malia and one of the others to names that differ at the first letter.
• Key run: PP-33, PP-34, PP-35, PP-36 all C. Role C to reorder one.
• "And" tells: L02-11 and L04-06 keys are the only options containing "and". Weak, but the brief asks.
• Terms assumed from earlier topics, not coined by any item here: natural resource, source card, giver / receiver / carrier, reservoir (L02-01), steam (L04-07, PP-38). Fine if Topic 26 and L02/L04 teach them.
• Chip words: PUSH (wind→turbine, water→wheel), ELECTRICITY (machine→homes), LIGHT (Sun→panel), HEAT (burning wood→room/tent), FOOD (hay→cow). Same meaning everywhere. No card description names the asked box or chip.
• "A push" / "the wind" never defensible against the key (L01-06, L03-01, L03-10, L04-08, PP-18, PP-21).
• Claim-verdict string ("Is X right?"): no, yes, no, no, yes, no — not all one way.

Adversarial answers (typed items)

Would not ship as is: L04-02, PP-49, PR-09, PP-42 (the Malia name; rename alongside Maddox/Maggie). Fix-if-cheap: PP-19, PP-09, L04-10, PP-33–36 run, L02-11, L04-06, PP-46.