Target/codes: read A and B within each shared place; distinguish a line's sound from its wait; partial AC9AMUFD01. Prepare: line key, two strips with six aligned columns, large circle/square/dash cards fixed on a stable surface; invitation A.
- Welcome · 3 min. Say, “Today two parts share six places. You can read, point, direct me or work without sound.” Offer a view of first/then/finish, rest and pass.
- Model · 4 min. Place A at 1 and B at 2, dashes elsewhere. Say at column 1, “A sounds; B waits”; at column 2, “A waits; B sounds.” Touch the column divider before advancing. Explain that a dash is not a new sound event.
- Try together · 5 min. Add both marks at place 3. Ask, “What does A do? What does B do in the same place?” Deliberately read across all A first; invite correction by selecting a column and reading both rows. Reset the model.
- Child choice · 7 min. Child chooses a new place for an A circle and a different place for a B square, fills remaining cells with waits, then describes all six columns. Adult places only on exact directions; accept AAC, sign, home-language explanation with suitable interpretation or pointing.
- Notice · 4 min. Preserve the first read of one occupied and one empty column. If the child treats a dash as a sound, model a single column's sound/wait contrast and retry elsewhere; do not score reading or motor speed as music understanding.
- Close · 2 min. Child may keep the score private. Ask which part needs a mark to join the other tomorrow. No cue playback is needed.