Bounds
All described events are original supplied fiction. No local experiment, child success, measurement, reader hearing ability or annual attainment is supplied.
Child invitation
Review the comparison against its question.
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 changes counted as fair, use unrelated toy-travel plan: compare rolling on same mat versus rolling different toys on different ramps. Child chooses which answers a mat question then designs a new sound comparison.
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
Name action as the planned change and ask which similarities were only planned.
Whole original context source and possible worked
C11 fictional costume shop asks whether tapping and rubbing the same lid will give different reports. Same helper/spot and one action each are planned. Before the trials, the helper predicts tapping and rubbing will give different reports, using an earlier supplied tap/rub comparison as the clue. Supplied reports: tap “short”; rub “longer”. Force not measured. Possible: “The described reports differ as predicted. The plan kept object/helper/spot similar; unmeasured force still limits an action-only cause claim.”