Target/codes: partition/combine a seven-piece collection in two ways and name parts/whole; AC9MFN04, AC9MFN05. Prepare: P157 five round + two square broad tabs, then three round + four square; part-whole tray.
- Notice · 3 min. Show two pretend puppet-kit groups: five round and two square tabs. Ask how many are in the kit altogether.
- Model · 4 min. Put each part in a labelled side of the mat, combine in WHOLE and count to seven. Invite quick recognition of a group up to five where comfortable, but do not require it.
- Guide · 5 min. Reset to three and four tabs. Child makes the whole, explaining why both arrangements have seven despite different part labels.
- Independent route · 7 min. Use Day 157 A/B/C in a puppet, pattern-kit or paper-exhibition fiction. Require both part names and the same whole; exact drawing polish is irrelevant.
- Evidence check · 4 min. Remove one part from view. Ask whether the whole can still be asserted without knowing what was moved; restore and recount rather than assume.
- Exit · 2 min. Child shows one way seven can be made from two groups. If parts and whole are mixed, keep each in a separate labelled compartment next lesson.