# Year 4 mathematics Weeks 3–4 · source, rights and review ledger

**Checked 29 September 2026.** This is a dated review, not a live update feed. Curriculum wording is reproduced only in the [exact code crosswalk](CURRICULUM-CROSSWALK.md) with attribution. The lesson prose, thirty learner routes, two unseen checks, fictional number contexts, mathematical diagrams and text alternatives are newly authored. No third-party illustration, worksheet, song, logo, photo, video or First Nations cultural material is bundled.

| Source or asset | Verification and use | Boundary |
| --- | --- | --- |
| [ACARA Version 9 downloads](https://www.australiancurriculum.edu.au/downloads) and [official workbook](https://www.australiancurriculum.edu.au/content/dam/en/curriculum/ac-version-9/downloads/curriculum-workbook.xlsx) | Pinned local import `products/curriculum-studio/data/frameworks/acara-v9.json`, source SHA-256 `db446882d2c00cf7c085a03e250e2442fda6c44011fc114680c46c1dc7a822c3`. The [verifier](verify_pack.py) checks exact Year 4 Mathematics text and official source rows `AC9M4N01` 17541 and `AC9M4N03` 17553. | Two **partial** content-description links, not all Year 4 standards or a current state/territory plan. Refresh before a later edition. |
| [QCAA ACiQ Version 9 Mathematics](https://www.qcaa.qld.edu.au/p-10/aciq/version-9/learning-areas/p-10-mathematics) | Queensland implementation entry point checked. It provides Year 4 standards/content and planning resources. | Each school must verify its current local syllabus, calendar and agreed teaching sequence. This pack does not claim QCAA assessment approval. |
| [ACARA copyright and terms](https://www.australiancurriculum.edu.au/copyright-and-terms-of-use) | ACARA curriculum text is attributed under its general CC BY 4.0 terms with plain-text modification. | ACARA excluded material, including logos, photos, videos and support resources, is not reused. No ACARA endorsement or affiliation. ICIP boundaries are respected: no community-held content is invented. |
| Decimal/fraction arithmetic | Independently recalculated with exact rational values in the [verifier](verify_pack.py), then checked against the [staff key](TEACHER-KEY.md) and learner prompts. Examples include `0.30 + 0.06 = 0.36`, `0.70 − 0.68 = 0.02`, `2/5 = 4/10 = 40/100`, `1/2 − 2/5 = 1/10`, and `3/4 − 3/5 = 3/20 = 0.15`. | Exact equalities assume the **same whole** and equal parts. A decimal number-line scale must have equal gaps. Fictional values do not establish real measurements. |
| Original [decimal-line](print/decimal-line.svg) and [equal-whole](print/equal-whole.svg) aids | Generated from [original drawing source](print/generate_print.py), visually inspected. Each PDF is one A4 page with selectable text. SVGs have title/description; the [complete text/tactile alternatives](print/TEXT-ALTERNATIVES.md) supply every prompt and spatial relationship. The equivalence sheet uses **five physically equal-sized square wholes**, correcting an initial draft with mismatched bar/grid footprints. | PDF tagging, real printer devices and human screen-reader/tactile co-design are pending. The blank aids do not contain assessment answers. |
| DejaVu Sans PDF font subset | [Font licence and full copyright notice](print/FONT-RIGHTS.md) accompany the embedded subsets. | Font rights remain separate from original lesson CC BY 4.0 material and Apache-2.0 code. No standalone font binary is bundled. |

**ACARA attribution:** © Australian Curriculum, Assessment and Reporting Authority (ACARA) 2010 to present, unless otherwise indicated. Curriculum material was downloaded from the [Australian Curriculum website](https://www.australiancurriculum.edu.au/) (accessed 29 September 2026), and modified for plain-text display in the code crosswalk. It is licensed under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) except where ACARA's terms specify exclusions. ACARA does not endorse SubjectNest and SubjectNest is not affiliated with, sponsored or approved by ACARA.

**Our original work:** Teacher scripts, contexts, thirty learner routes, held-out tasks, staff keys, vector layouts and text/tactile alternatives © NeuroForgeIO Pty Ltd 2026, [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/); credit, link and indicate changes. Python drawing and verification code are Apache-2.0 as stated in [CODE-LICENSE.txt](CODE-LICENSE.txt). No translation or First Nations-language edition is released. Such material needs expert, community-authorised translation and review rather than automatic substitution.

**Review state:** The [teacher/learner/home/funder desk run-through](RUN-THROUGH.md) tests representative tasks and artifacts, not classroom learning. Educator, local syllabus, accessibility-user, cultural and child-safety review, classroom pilot and impact evidence remain pending. An automatic link, code, arithmetic or print pass cannot establish student outcomes or year-long coverage.