Teacher. The scripts give ten timed starts, an explicit key, worked one-edit models, two formative checks and next responses. I can set out a fixed card strip without a device. The three-lane symbols may feel dense for some Prep children; I will introduce one event, then two takes, and cover unused lanes while pointing to the changed lane. I must keep a real source, actual sounding and audience fields blank unless those events occur. The integrated Week 19 science test remains separate. A local school timetable, equipment check, accessibility review and cultural source selection still belong to the educator.
Learner. I can read a big word/key, use tactile raised lines/circles/dots, direct an adult to place cards, use AAC or work silently. I can author a meaningful edit without selecting an emotion or explaining a family context. A neutral adult must not turn Check Z's blank revision into an answer. A printable PDF is not itself tactile; a grown-up must build broad cards from the exact directions. I can decline a sound or recipient.
Funder/assessor. This is an original, openly licensed ten-session slice with 30 routes, 20 worked swaps, 20 optional bridges, eight A4 aids and four reproducible candidate cues. It is not a class pilot, an accessibility certification, a claim of improved scores, a complete Music course, or evidence of community use. Workbook rows and source caveats are explicit. The local verifier checks files and logic; it cannot judge children's experience. A sound file must pass human listening and device-level review before use.
Critical fix applied by design. A “one variable changed” phrase can tempt a scientific causal claim. Here the comparison is a compositional choice, and documents use “one mark changed” rather than asserting identical real acoustic experience. For any actual sound trial, the educator notes the cue, device, volume setting and child's own response. A paper score can be readable without proving a listener heard the intended change. Sharing is optional and counted only after a willing recipient actually receives the work.