# Sources, rights and review boundaries

**Date:** 29 September 2026. The [ACARA Australian Curriculum v9 download](https://www.australiancurriculum.edu.au/downloads) supplies exact Year 4 content-description codes and text. The official workbook XLSX SHA-256 is `db446882d2c00cf7c085a03e250e2442fda6c44011fc114680c46c1dc7a822c3`; the local canonical import is `products/curriculum-studio/data/frameworks/acara-v9.json`. The [crosswalk](CURRICULUM-CROSSWALK.md) lists six selected rows and the activity limits. [ACARA copyright and terms](https://www.australiancurriculum.edu.au/copyright-and-terms-of-use) govern its descriptions; ACARA has not endorsed or approved this work. Check the current official version and applicable state/territory implementation before reissue.

| Claim or asset | Evidence/source | Boundary and reuse |
| --- | --- | --- |
| Decimal rails and fraction equivalences | Exact arithmetic in [staff checks](TEACHER-KEY.md), independently recalculated; same-size whole and equal gaps are explicit. | These are mathematical models, not measurements of a real route, site or person's access. All examples and layout are original SubjectNest, CC BY 4.0. |
| Fictional invitation, instruction, explanation and opinion | [Original source cards](ORIGINAL-SOURCES.md) authored for this project. | No real visitor, school policy, local place, family statement or First Nations perspective is asserted. A real setting needs source and permission review. |
| A4 exhibit rail aid | Original SVG drawn for this pack, converted to PDF locally; [text/tactile alternative](print/TEXT-ALTERNATIVES.md) contains the same prompts. | Both formats are original CC BY 4.0. PDF may contain system font embedding under the font's separate licence; [font note](print/FONT-RIGHTS.md). No external image, music or recording. |
| Teaching sequence and access options | Original scripts and a simulated [desk run-through](RUN-THROUGH.md). | Educator, child, family, disability specialist and local syllabus review are still pending. Options are not fixed learner types; no learning impact is claimed. |

**Safety and privacy:** Use broad paper parts, dry tabletop materials and school-approved shared space. No sharp tool, glue, hot water, pupil photograph/voice, personal route or account is required. A student can choose no touch and a private audience; record an adult's action separately from the child's decision. A genuine safety or welfare disclosure belongs in the school's safeguarding process, outside this fictional task. If adapted for a real community exhibit, consult the people and knowledge holders whose information is used; do not fill First Nations language or cultural gaps with invented or automated translations.

**Rights:** Original SubjectNest material © NeuroForgeIO Pty Ltd 2026, [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/): credit, link, mark changes. Code in `verify_pack.py` is Apache-2.0. ACARA source descriptions and any third-party font terms remain separate. This is a dated source check and author desk review, not a human specialist or classroom approval.