Target/codes: represent selected 0–20 numerals, recombine ten as six and four, then model add/remove practical changes; AC9MFN01, AC9MFN04, AC9MFN05. Prepare: P196, number rail, part mat.
- Notice · 3 min. Show 0 as an empty frame and 20 at the end of the rail. Ask which source objects would be needed before calling a frame ten.
- Model · 4 min. Put six broad labels in one part and four in another, then combine visibly to ten. Keep part labels.
- Guide · 5 min. Child builds a separate 6 START +2 ADD =8 model; then resets and removes three from eight to leave five, keeping OUT pieces visible.
- Independent route · 7 min. Day 196 A/B/C choose cards, marks or adult directions to show 6+4=10, 6+2=8, 8−3=5, naming each source/change. These are three small review actions, not an all-year operations score.
- Reason check · 4 min. Offer a displayed end of four after 8−3. Child rechecks five IN and three OUT total eight, repairing the card from model evidence.
- Exit · 2 min. Keep an authentic child evidence note or mark NOT AVAILABLE; next practise whichever part/change action actually needed help.