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: regroup the same source by border, keeping unavailable information in CANNOT TELL; AC9TDIFK02 partial. Prepare:A source, C border bays, broad solid/dashed/? markers.
Welcome · 3 min. Ask what changed since yesterday: the badge source or the question. Point to the unchanged source.
Model · 4 min. Place ID 1 SOLID and ID 2 DASHED. Show ID 5's ? means border not shown, not a made-up third border type.
Try together · 5 min. Child places IDs 3 and 4 from their visible border marks, then directs where 5 belongs.
Child choice · 7 min. Child explains or indicates why one badge moved to a different bay under this new rule; repeat in pictorial or symbol form if helpful.
Notice · 4 min. Record source-backed placements and whether unknown was kept honest. No plant/animal property is inferred.
Close · 2 min. Ask which source field a new reader would need to understand the display.