# Source, arithmetic and rights ledger · Year 7 maths Days 11–20

| Item or claim | Evidence and check | Limit |
| --- | --- | --- |
| Year 7 Australian Curriculum v9 descriptions | [Official ACARA workbook](https://www.australiancurriculum.edu.au/content/dam/en/curriculum/ac-version-9/downloads/curriculum-workbook.xlsx), source SHA-256 `db446882d2c00cf7c085a03e250e2442fda6c44011fc114680c46c1dc7a822c3`, retrieved 29 September 2026. [Exact crosswalk](CURRICULUM-CROSSWALK.md) pins codes, rows, level, area and verbatim plain text. | A dated partial five-description mapping, not a whole-year coverage statement or state approval. |
| Queensland implementation reference | [QCAA P–10 Mathematics v9](https://www.qcaa.qld.edu.au/p-10/aciq/version-9/learning-areas/p-10-mathematics), checked 29 September 2026. | Initial Australian state reference; this specific sequence is not claimed to be endorsed. Other state/territory implementation needs local review. |
| Rational operation examples | `1/2+3/8=7/8`; `5/6−1/3=1/2`; `3/4×2/3=1/2`; `2.4÷0.6=4`; `12.5% of48=6`; Day15 `2/3+1/4=11/12`, `7.2÷0.3=24`, `15% of80=12`. Exact [staff key](teacher/ANSWER-AND-NEXT.md) and verifier arithmetic. | Values are invented, and units/whole matter; no measured student result or actual purchase is implied. |
| Factor and square examples | `60=2²×3×5`, `72=2³×3²`, `90=2×3²×5`, `150=2×3×5²`, `144=12²=2⁴×3²`; Day20 `108=2²×3³`, `196=14²=2²×7²`, `75=3×5²`. Staff key and verifier multiply back. | No claim that one lesson establishes general factorisation or square-root mastery. Positive principal roots only in this context. |
| Original invented domains | Made-up mosaics, animation minutes, file segments, tracks, panels and paper collections; no third-party worksheet or real-person testimony. | No local/cultural/financial outcomes are attributed. |
| Three original A4 SVG/PDF pairs | [Drawing script](print/generate_print.py), [full alternatives](print/TEXT-ALTERNATIVES.md), PDF page/text/font checks and visual raster inspection. | Desk accessibility review only; screen-reader, tactile-print and low-vision user trials remain open. |
| Formative checks | Day15/20 six unseen items, separate [staff key](teacher/ANSWER-AND-NEXT.md) and access/content-hint recording. | Not a validated test, grade, diagnosis or formal achievement-standard scale. |

## Rights and provenance

- **ACARA:** © Australian Curriculum, Assessment and Reporting Authority (ACARA) 2010 to present unless otherwise indicated. The [crosswalk](CURRICULUM-CROSSWALK.md) displays content-description text from the official workbook, with plain-text whitespace normalisation and modification note. Curriculum material is [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) subject to the [official exclusions and terms](https://www.australiancurriculum.edu.au/copyright-and-terms-of-use). No ACARA logo, third-party support resource or photo is copied. ACARA does not endorse SubjectNest.
- **Original SubjectNest:** © NeuroForgeIO Pty Ltd 2026, CC BY 4.0, covering original lessons, fictional problems, learner pages, checks/keys, SVG layouts and full alternatives. Reusers credit SubjectNest by NeuroForgeIO Pty Ltd, link the licence and indicate changes.
- **Python scripts:** [Apache-2.0](CODE-LICENSE.txt).
- **PDF font:** DejaVu Sans subsets retain [their own rights](print/FONT-RIGHTS.md) and [full notice](print/dejavu-font-copyright.txt); no standalone font ships.
- **First Nations content:** No language, story, Country/Place knowledge, cultural pattern or identity is invented. Any local addition requires appropriate source, community relationship and review; this pack makes no claim to have supplied one.

A Year 7 teacher, access specialists and real learners still need to review demand, timing and access. Refresh dated curriculum sources before expansion. See the [honest desk run-through](RUN-THROUGH.md).