Bounds
All described events are original supplied fiction. No local experiment, child success, measurement, reader hearing ability or annual attainment is supplied.
Child invitation
Tell a reader what the four positions show.
Different child try
Child chooses an unrelated everyday job and writes/draws one source/action clue plus one unknown. Do not copy the ordinary worked sentence; keep any actual event distinct.
Materials
Full printed/readable source, blank paper guide and optional exact scribing/AAC; no required device/audio/material purchase.
Next teaching
If all motion becomes sound proof, use unrelated wind-up toy source notes: its wheels move but no bell report exists. Ask which extra source would be needed for a bell claim. Return to a different movement model.
Observe
Listen/read/point for the exact source-qualified distinction named in the invitation; record authorship, support and actual/supplied/model mode. A selected label without its meaning does not prove the whole understanding.
Role
ordinary teaching/worked model; never independent held assessment evidence
Teacher moves
Read the caption no time measurement before stepping the frame.
Whole original context source and possible worked
C07 fictional toy-repair instructions show paper strip at centre, left, centre, right; caption “four selected positions, no time measurement”. Possible: “This is a movement model. It does not tell us the pitch, loudness or whether a listener heard a sound.” F2 fact card says incoming sound waves can make the eardrum vibrate; it is a reference account, not this child’s observation.