# Source, fact and rights ledger · Year 9 supplementary Weeks 3–4

## National curriculum pin

The [exact selected crosswalk](CURRICULUM-CROSSWALK.md) is generated from the local `products/curriculum-studio/data/frameworks/acara-v9.json` import of the [official ACARA Australian Curriculum Version 9.0 workbook](https://www.australiancurriculum.edu.au/content/dam/en/curriculum/ac-version-9/downloads/curriculum-workbook.xlsx), retrieved **29 September 2026**. Workbook SHA-256: `db446882d2c00cf7c085a03e250e2442fda6c44011fc114680c46c1dc7a822c3`; local import SHA-256: `15fbbef5283a4b48b8a8e00ae3c7c635377cea2175afc1f2f12d12f9d5453e60`. The verifier checks the local workbook/import, code, `source_row`, exact level, subject and full content-description wording. Codes express **partial instructional links**, not full achievement or state adoption. ACARA material is © ACARA 2010 to present, accessed 29 September 2026, adapted as an annotated plain-text selection under its [copyright terms](https://www.australiancurriculum.edu.au/copyright-and-terms-of-use) and [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) where applicable. ACARA does not endorse this pack.

## Independently checked factual principles

| Factual use in authored prompts | Primary/authoritative source checked 29 September 2026 | Exact limit |
| --- | --- | --- |
| Plants take in atmospheric CO₂ in photosynthesis; respiration/combustion can add CO₂ to the atmosphere. | [NASA Science, carbon cycle](https://science.nasa.gov/kids/earth/what-is-the-carbon-cycle/) and [NASA Earth Observatory, carbon cycle](https://science.nasa.gov/earth/earth-observatory/the-carbon-cycle/). | Supports process directions, not any invented pond/carbon amount or net balance. Our diagram is not copied from NASA. |
| Mechanical sound needs a medium; electromagnetic light can travel through a vacuum. | [NASA Science, Anatomy of an Electromagnetic Wave](https://science.nasa.gov/ems/02_anatomy/). | Supports the model contrast, not sound speed/loudness, actual classroom acoustics or a space recording. |
| Balanced hydrogen/oxygen and magnesium/oxygen symbol equations conserve atom counts; coefficients and subscripts have different roles. | [Royal Society of Chemistry, chemical formulas and equations](https://edu.rsc.org/cpd/chemical-formulas-and-equations/3010001.article). | Supports conventional notation/counts; no chemical experiment or safe mixing procedure is supplied. |
| Constitutional referendum requires a national yes majority and yes majorities in at least four of six states; territory votes count nationally. | [Australian Electoral Commission, Referendums](https://www.aec.gov.au/elections/referendums/). | The rules are real; every vote total and state label in this pack is invented. Verify current AEC guidance before teaching. |
| HTML has structure/content distinct from presentation; `h1` and `p` tags express different document roles. | [WHATWG HTML Standard for Web Developers](https://html.spec.whatwg.org/dev/introduction.html). | Our snippet is invented and offline; no deployed site or accessibility conformance is asserted. |
| APP 3 guidance calls for collection of personal information reasonably necessary for an APP entity's functions; data minimisation is a design principle. | [Office of the Australian Information Commissioner, APP 3 collection guidance](https://www.oaic.gov.au/privacy/australian-privacy-principles/australian-privacy-principles-guidelines/chapter-3-app-3-collection-of-solicited-personal-information), updated 13 May 2026. | Which laws apply to a particular school/service needs local legal/privacy review. The mock form collects no information and is not compliance advice. |
| Physical activity guidance encourages regular, age-appropriate movement for young people. | [Australian Government 24-hour movement guidelines](https://www.health.gov.au/topics/physical-activity/24-hour-movement-guidelines-for-all-australians). | No specific dose, treatment, fitness change or individual health advice is inferred from our short optional movement activities. Local safe participation controls. |

**RSC access check:** The web reader returned HTTP 405 for the RSC article, but a direct browser-style HTTP GET returned 200 on 29 September 2026 and its article text explicitly contains both `2Mg + O₂ → 2MgO` and `2H₂ + O₂ → 2H₂O` examples plus the coefficient/subscript explanation. A future reviewer should retry the linked page in their browser if its delivery behaviour changes. The equations are also independently recounted in our local verifier.

History's “1884/1890” cards and both modern captions were **authored in 2026** as provenance exercises. They are not archival records or evidence about nineteenth-century workers. HASS trade, travel, economics and civics numbers are imagined; their arithmetic is checked by the verifier. HPE situations describe no real learner. Design/material durations are fictional or, where a teacher actually folds paper, limited to that observed classroom trial. Arts stimuli, the pulse and media frames are original and do not stand for a cultural tradition. No external image, sound sample, song, document scan, child photograph or third-party lesson text is embedded.

## Reuse boundaries

| Material | Rights and provenance |
| --- | --- |
| Fifty lesson blocks, learner cards, ten check cases/keys, context swaps and all invented prompts/data | Original SubjectNest work © NeuroForgeIO Pty Ltd 2026, [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/); credit author, source, licence and changes. |
| Six original SVG/PDF A4 aids, their text/tactile descriptions, original pulse WAV and score | Same SubjectNest CC BY 4.0 content grant. [Font rights](print/FONT-RIGHTS.md) are separate. |
| Print/audio generators and offline logic lab | Newly authored code under [MIT](CODE-LICENSE.txt); no bundled dependency or network service. |
| Embedded DejaVu Sans | Third-party font, outside our CC BY grant. Full [copyright/licence notice](print/dejavu-font-copyright.txt). |
| Official curriculum wording, external factual sources | Their own terms above. We link to them and author all student-facing scenarios ourselves. |

No translation accuracy, First Nations cultural authority, classroom effectiveness, disability usability or legal compliance is claimed. These need qualified review with the relevant people before any public assurance.