Target/codes: Compare A's drawn marks with B's label and preserve “use not recorded”; AC9HSFS01, AC9HSFS02 and AC9HSFS04 partial. Ready: archive card, A/B source tags, two trays SHOWN and NOT RECORDED.
Child product: An attached catalogue label and deliberately empty USE window.
- Open · 3 min. Revisit yesterday's open question about use. Invite a first guess, labelled guess.
- Read source · 4 min. Read B exactly, including “Use not recorded.” Say the label describes A but is no material test.
- Model · 5 min. Put “three bars” under SHOWN IN A/B and “bookmark” under NOT RECORDED. Explain that a plausible guess remains a guess.
- Child inquiry · 7 min. Play catalogue keeper: child attaches the exact B label below the display copy and makes an empty USE window from two broad paper cards. Sort narrow outline, round hole, who used it and what it was made from into the shown/open windows. Say “What does this label tell? What box stays empty?” No actual material is tested.
- Check/respond · 4 min. If child turns “Paper Marker Box” into proof of paper material, clarify that it is the invented collection's name; actual material is not tested.
- Exit · 2 min. Child finishes “B records __; B leaves __ open.” Next move: introduce one named account tomorrow.