Goal: represent a practical increase from 5 to 7 and explain what changed. Codes: AC9MFN05, AC9MFN03. Prepare: card A and three labelled trays.
- Retrieve · 3 min. Flash 4 large counters briefly; child names the amount or counts, then checks. Record whether it was subitised or counted.
- Model · 5 min. Place 5 paper ramp marks in Start. Move them to a row, add 2 distinct marks and count each once: 1–7. Say “Five, then two more; seven now.” The number is a card count, not the toy's movement.
- Guide · 5 min. Repeat with 3 then 2 on a new tray; child says, signs or selects “add” and shows 5. Check by pairing each count word to one object.
- Independent · 7 min. Child uses new 5 then 2 with card A, chooses objects/digital marks and records 7 or shows a seven collection. Ask “How do you know?” before demonstrating. Exact expected total: 7.
- Compare · 3 min. Ask whether adding paper marks proves the toy will travel farther. Expected no; numbers model the setup only.
- Exit · 2 min. Give 4 then 1; expect 5. Next day reteach one-to-one counting if any mark was skipped or counted twice.