Goal: choose the explanation whose claim matches C and identify why “always” reaches beyond one test. Proposed codes: AC9EFLA05, AC9EFLY05. Prepare: C and D, claim/evidence/question mat, Card 167.
- Oral/print · 3 min. Adult says “one test” and “all tests.” Child hears the difference; optional child print is separate.
- Read · 4 min. Read D's two explanation cards with equal voice. Ask the child to point to the word that makes Explanation 1 too broad.
- Model · 5 min. Put “card suited this reported roof trial” under CLAIM and C's tissue/card result under SOURCE. Put another disk/gap under STILL TO TEST.
- Child try · 7 min. Choose paper bridge model, toy-display canopy or folder-cover route. Child picks the bounded explanation and tells which source detail supports it by voice, AAC, sign or point.
- Check · 4 min. Ask whether “looks thick” alone proves “always best.” Accept a source-bound no and a question about different loads; record exact reason.
- Exit · 2 min. Invite a prediction labelled as a prediction; do not score it as an observed result.