Topic 3 "How to investigate a force like a scientist" — your read (8 October 2026)

Reader B agreed every key. Reader C disagreed on L01-07, PP-01 and PP-02, and both readers marked the same three as having two defensible answers: their options said "toward / away from the stronger push (blow)", which for a push can mean the pusher's side or the push's direction. The keys were right; the options now name the people ("away from the two children", "away from the child who blows harder"), and every other push item was swept. The readers' other flags were applied the same hour: a quiz drawing that listed every plan line beside the item asking which line was missing (the item now comes first); a distractor that was the next item's key; a bank plan that also lacked its measurement line (now stated); wider accept lists for the typed seconds; a steer for "fair testing" on the typed term; and the unit-placement item's stem now states the rule. Draw constraints for the bank's shared tables and shared scenarios are on the type sheet. Full detail: the review record's "Adjudication" section.

Must-fix: L01 said that when Desmond let go of the moving box "the pulls are equal again, and the box stays still" — Grade 3 taught that balanced forces leave a moving thing moving, and this topic's own recall item tests it; now everyone lets go, the box stops, and the equal pulls go back on a still box. Two explanations (the heavy desk in L01's quiz; the book in the bank) said unequal pushes move a thing toward the stronger push — a push moves a thing away from the pusher; both rewritten, keys unchanged. The rubber-band launcher was drawn with the car on the far side of the pegs, so the stretched band would have fired it toward the near end of the board, and at 10 and 15 centimeters the band did not reach the car; it is redrawn as a slingshot that fires along the board, and the cartoon brief and the L05 screen direction say the same. One L04 beat cued a chip on words the narrator never says.

Worth fixing: L03's rule now carries Grade 4 Topic 2's second and third sentences word for word (the record claimed it; they were paraphrases) and every why says "on purpose" as Grade 4 does; Grade 3's coining frame for "unbalanced forces" became Topic 2's recall line; a line counted three pulls where the drawing shows two arrows; a caption said the car stopped at 95 where the drawing has it at the top; nine rolls sat in a table where six had been narrated; "the steeper ramp rolled"; "gives the stronger push"; two stems leaned on the previous item's boy; five scenes reappeared where they should have been fresh (the sled with a third puller in L01's attached question and the summary; the heavier sled on a hill in three places; the harder kick in two attached questions; the sled again in L01 q9) and were re-scened (a tire, a bean plant, a pumpkin on a slope, a spray bottle, a plastic tub); a "barge" left over from a rename; a pull in the pushes option set; a muddled canoe line; "the grass's drag"; three launcher pictures too small to read, now stacked and legible.

Left as simplifications, on the record: friction and the vertical forces not drawn on the box; two children on one rope as one longer arrow (the rope's pull is one force on the box); "what usually happens" for any averaging; one unit word closing a list of numbers in the scripts; the launcher's ruler reading toward the near end; a toy duck floating "at the same height" in salty and plain water.

Gates after the fixes: checker 0 FAIL (S46 B = C = D = 0); terms no hits; articles 0 FAIL; key tells 0 of 122; svg ids PASS; shared checker 0 FAIL, S118 silent; bundle re-cut (115 MCQ, 10 typed of which 7 numeric, 1 written; 126 held); batch rebuilt and check_brief.py clean; not sent.

52 items in content/G5T03_pp100_bank.py: 46 four-option MCQs, 2 typed terms ("fair test", Grade 4's word), 4 typed differences read off drawn tables (centimeters, seconds). Per atom: FOR5-024 9 · SR5-001 8 · SR5-002 13 · SR5-003 9 · FOR5-025 13. Easy 17, medium 22, hard 13, sorted easy to hard and rising with the atom's place. MCQ keys A 13 · B 13 · C 13 · D 7. Twenty-two question types, one exemplar each on the type sheet: what the object does when a third pusher joins (the fixed set); which is true of two pushes on a still thing; the one thing changed; the checkable prediction; can the test check these words; which plan line a phrase belongs on (the fixed set); the missing plan line on a drawn board; what is wrong with a drawn plan; change, same, measure for a fresh test; is it a fair test; how many times (the fixed set); why three runs differ, which usually, which runs to look at; the term from its definition; which sentence is a prediction; which question is about a force; the plan parts for a puck experiment; was the prediction right from a drawn table; the register's beliefs by their correct reason; the typed term; the typed differences; what to do after one run each; what to write when the result contradicts the prediction; the missing or wrong part of a whole design. Every scene is fresh against the lessons, the quizzes and the practice.