Target/codes: compare two like collections up to 20 by count or one-to-one matching, not spacing; AC9MFN01, AC9MFN03. Prepare: P154 A fourteen spread broad squares and B eighteen compact broad squares, count-once mat.
- Notice · 3 min. Place the longer-looking A beside compact B. Ask which looks larger and label the first impression as a guess.
- Model · 4 min. Pair one A square to one B square until a B square remains; point out that matching tests the amount of like pieces rather than line length.
- Guide · 5 min. Child chooses pairing or separate tracked counts. Confirm A = 14 and B = 18 only after the child's first attempt; do not count for the child while recording independence.
- Independent route · 7 min. Use Day 154 A/B/C in book display, toy-track or poster-border fiction. Require “B has more” with matched leftovers or counted evidence; the difference of four is optional.
- Evidence check · 4 min. Move the fourteen into a compact square and spread the eighteen. Ask whether the answer changes and what evidence survives the move.
- Exit · 2 min. Child gives one reason row length is unreliable here. If a piece was lost, reprepare rather than score the response.