Goal: independently sort a new source-labelled paper set by one stated property, preserve a counterexample and reject an overbroad material rule. Proposed codes: AC9SFU03 (model reasoning), AC9SFH01, AC9SFI01, AC9SFI03, AC9SFI05. Prepare: unseen teacher-held Case AE, blank sort mat, Card 140 only after response.
- Preflight · 3 min. Keep the held source unseen; prepare exact accessible equivalent and private first-response capture.
- Present · 4 min. Read all novel FICTIONAL PAPER CASE labels and the claim once, without sorting for the child.
- Think · 5 min. Allow independent time; log neutral reread, not a leading cue.
- First independent response · 7 min. Child states the one-property sort, names the counterexample, distinguishes maker-reported material from drawn appearance and asks a safe next question.
- Boundary · 4 min. Ask what local approval/date/actual view and material provenance are needed before a real-sample claim. Paper-only stays REAL OBSERVATION NOT AVAILABLE.
- Close · 2 min. Use the separate key after first response to plan one next teaching move.