Target/code: represent nine broad cards as equal groups of three and distinguish group size from number of groups; AC9MFN06. Prepare: P173 nine pretend roof cards and three wide empty frames on the grouping mat.
- Notice · 3 min. Read “Put three roof cards in each kit.” Ask what will tell us a kit is complete; one, two, three cards together.
- Model · 4 min. Fill the first wide group frame with three cards, counted once; say “one complete group of three” rather than “three groups”.
- Guide · 5 min. Child/directing adult fills the next frames with the remaining six cards. Keep frames visibly separate and check none remains.
- Independent route · 7 min. Day 173 A/B/C in a toy roof kit, library tab bundle or music-card case requires three cards per group and three complete groups.
- Evidence check · 4 min. Point to one frame, then the whole mat; ask separately “How many cards here?” and “How many groups here?” Record any swapped labels before feedback.
- Exit · 2 min. Child names or shows a complete group. If they make uneven groups, reset one group at a time and check each against a model frame.