Target/codes: compare A|B with B|A while preserving each four-cell phrase's internal order; AC9AMUFD01, AC9AMUFC01. Prepare: C order aid, Practice C, broad A and B cards.
- Welcome · 3 min. Introduce invented B
– X X –next to known AX – X X. Both are original paper phrases. - Model · 4 min. Place A then B, then move the whole phrase cards to B then A without rearranging their four internal cells. Optional reviewed L cue (playback review held) is A|B only.
- Try together · 5 min. Child points to where A appears in each order and verifies A still has three events, B two, both four beat places.
- Child choice · 7 min. Child chooses A|B or B|A for a fictional two-page helper story or paper roll/slide comic, then explains how order may change their intended musical shape. No real listener outcome or physics claim.
- Notice · 4 min. Check eight beat places, five planned events and internal phrase cells unchanged. A static choice alone cannot establish aural order recognition.
- Close · 2 min. Store both full-score orders. Next the second phrase can vary while order stays.