Teacher copy: This page may include teaching prompts or answer keys. Answer keys in this public library can be viewed by anyone. Give learners a clean prompt, use checks as formative evidence, and change a case locally when prior access matters.
Target/codes: operate or direct the child-owned paper work through A, reset, then B, finding any sign–ending mismatch; AC9AMAFD01, AC9AMAFC01. Prepare: child’s assembled work, F testing log, large A/B or shape cues.
Welcome · 3 min. The maker can check both paths privately. This is not yet an actual willing audience.
Model · 4 min. On adult’s work, select A, reveal its ending, reset both covers, then select B. Show how a hidden ending stays hidden.
Try together · 5 min. Child chooses first route for own work and directs/operates it. Adult records the actual ending displayed without quietly fixing it.
Child choice · 7 min. Child tests the other route, identifies one mismatch if any and chooses a repair. Adult assists physical assembly if asked.
Notice · 4 min. Read back predicted versus actual route outcome. If the mechanism cannot operate, mark “planned only / assembly needs work,” not “tested.”
Close · 2 min. Save repaired or held work for clearer choice cues tomorrow.
