Target/codes: independently turn a given spreading four-event plan into a gathering plan by changing only gap 1 and gap 3, preserving middle gap and all four event marks; AC9AMUFD01/FC01. Prepare: public Gap 2, A4 check, raised cards; key closed.
- Welcome · 3 min. New paper timing task after separate integrated subject checks; no playback, movement or audience is needed.
- Access · 4 min. Show A gaps S–M–L and an identical B copy around four same L/V/A event marks. Read every mark neutrally.
- Independent plan · 5 min. Child changes B so each gap is shorter than the one before, with M still in the middle; event identities remain.
- Child response · 7 min. Save first complete B, names of both old/new gap changes, the held middle and event marks, a child-owned musical reason, and what the paper cannot prove.
- Self-check · 4 min. Child compares all three corresponding gaps and four event marks without adult hints.
- Close · 2 min. Consult private key afterward; continue with a different base if more practice is needed.