Target/codes: independently repair exact delayed B copy while preserving A/initial waits; partial AC9AMUFD01/FC01. Prepare: public Echo 2, new page, complete given/neutral raised mapping; key closed.
- Welcome · 3 min. “Keep A. Repair its later B copy.” Neutral AAC/sign/words/direct-adult/marks/rest/pass; separate from integrated checks/practice.
- Access · 4 min. Read full given A/B rhythms, initial waits/outer done and rules neutrally. Question cells undecided. No matching sound/classified change/solution hint.
- Independent plan · 5 min. Child keeps all A/initial B waits, chooses every Bidea decision exactly corresponding two shared beats later. Save first complete answer before support.
- Child response · 7 min. Show removed/added/held choices, windows versus planned simultaneous marks and paper limits; own musical reason optional. Neutral adult records only child directions.
- Self-check · 4 min. Compare all four corresponding steps independently; preserve first/self-revision/support. Pass/inaccessible/unobserved is not failed listening, offer another opportunity.
- Close · 2 min. Key after first work, today's variants/bridges later practice. No required actual performance or full-standard claim.