Ten optional 25-minute Term 4 sessions, Days 191–200. Children make Back to the Start: an own five-beat sound/wait FIRST idea, then its five decisions last bit first as BACK. FIRST local 1–5 uses shared beats 1–5; BACK local 1–5 uses 6–10. The whole piece has ten shared beat places. Compare FIRST 5→BACK 1, 4→2, 3→3, 2→4, 1→5, waits included. Child chooses an imagined there-and-back puppet/picture scene or music alone, title/purpose or unstated, familiar source and private/optional sharing. Try one short phrase first with exact locally reviewed quiet source; whole ten-beat take optional. No physical travelling, object passing, fixed speed, simultaneous/two-person work, public performance, purchase, recording or family disclosure.
Share One Rhythm W37–38 shared one line's events between sources. This fresh focus reverses decision order inside a phrase, extending earlier phrase order/return/revision into rhythmic retrograde. It does not merely swap whole phrases, echo the original, change timbres or reverse an audio waveform/melody. Same fixed source is allowed throughout; rests are real decisions. This is musical form/duration planning, not mathematics certification or a physical direction task. Short actual making comes before correspondence discussion in ordinary lessons.
Integrated Week 39 supports clear source/audience explanations and Week 40 truthful available-work handover. Portfolio separates own plan, child/adult maker/support, actual source encounter/response, aural/rhythm/entry scope and willing audience receipt; missing evidence stays NOT AVAILABLE/UNOBSERVED. No invented samples/growth/year-end level. Placement follows year sequence, not an official timetable.
Supplied Back to the Start is an actual original SubjectNest computer-created teaching model with score/source card and mathematical sound candidates at one pitch anchor. Documented author purpose: model a rhythm played with last bit first so children make/direct an own tiny there-and-back piece. No named human composer/performer, community tradition/importance, actual scene use or achieved benefit invented. Narrow partial FE01 requires actual source encounter and observed child response; broader people/community contexts still need varied appropriate actual works/context/authority.
Use ten scripts, seven making invitations, 30 routes, 20 worked domains, 20 free optional bridges, short prompts, two held fresh public checks and separate teacher key/next. Nine original A4 SVG/searchable-PDF pairs, including a truthful portfolio aid, have exact linear/raised/no-sound alternatives. Fresh pages held until Days 195/200 before practice/key; no matched audio/answer demo.
Three candidate WAVs/full transcripts are not cleared: HUMAN LISTENING NOT DONE / DEVICE NOT APPROVED / LOCAL VOLUME NOT APPROVED. Whole-file human review on intended device/comfortable local volume/access/stop before playback. Quiet live making separately requires exact familiar source/material/technique/space/willing participant review. Child may actually make one phrase, direct an adult, plan silently or pass; adult realization adult performance, silent plan not child performance. Actual sound/aural/scoped rhythm/entry/support/audience evidence distinct. No compulsory voice/body/object striking/headphones.
Current crosswalk, rights/authority, additional-source gate, four-role desk critique and QA distinguish computer/author checks from real use. Not independently educator-reviewed, child/family-tested or classroom piloted. This final fortnight completes authored Music starts in the planned sequence; it does not certify whole Music curriculum or Foundation year. Whole achievement-standard attainment, actual effect, universal access/acoustic safety and official/cultural endorsement are not established. Wider aural/music/community experiences/local review remain required.
Original text/score/illustrations/named work/tones/code © NeuroForgeIO Pty Ltd 2026, CC BY 4.0, credit “SubjectNest by NeuroForgeIO Pty Ltd”, source/licence/changes. Curriculum/font/First Nations knowledge retain own terms/authority. From pack folder: deliberate python3 generate_assets.py --write; read-only python3 verify_pack.py; temporary rejection checks python3 verify_negative_probes.py; reviewed hash refresh python3 verify_pack.py --write-manifest. Portable relative commands/no automatic playback.