# Foundation Music / Queensland Prep · Weeks 39–40

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](../weeks-37-38/README.md) 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](../../../term-4/week-39-explain-it-for-a-visitor.md) supports clear source/audience explanations and [Week 40](../../../term-4/week-40-what-the-work-really-shows.md) truthful available-work handover. [Portfolio](PORTFOLIO.md) 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](../../../year-sequence.md), not an official timetable.

Supplied [Back to the Start](SUPPLIED-WORK.md) 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](LESSONS.md), [seven making invitations](MATERIALS.md), [30 routes](LEARNER-CARDS.md), [20 worked domains](PRACTICE-SWAPS.md), [20 free optional bridges](EXAMPLE-BANK.md), [short prompts](PROMPTS.md), [two held fresh public checks](STUDENT-CHECKS.md) and separate [teacher key/next](teacher/KEY-AND-NEXT.md). Nine original A4 SVG/searchable-PDF pairs, including a truthful portfolio aid, have [exact linear/raised/no-sound alternatives](print/TEXT-ALTERNATIVES.md). Fresh pages held until Days 195/200 before practice/key; no matched audio/answer demo.

Three [candidate WAVs/full transcripts](audio/ASSET-INDEX.md) 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](CURRICULUM-CROSSWALK.md), [rights/authority](SOURCE-AND-RIGHTS.md), [additional-source gate](AUTHENTIC-SOURCE-SLOT.md), [four-role desk critique](RUN-THROUGH.md) and [QA](QA-RECORD.md) 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](https://creativecommons.org/licenses/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.