# Desk run-through · 29 September 2026

This is a **desk simulation by the author**, not classroom observation, teacher usability research, student learning evidence, a funder review or QCAA approval. The scheduled 25-minute clocks are planned allocations; no actual class timing has been measured.

## Teacher pass

I started from [README](README.md), opened [Day 11](LESSONS.md), printed the period converter, and checked that the annual-period assumptions and reverse-check prompt were visible without the key. I followed the Day 15 and Day 20 instructions: learner prompts are in a separate [public file](STUDENT-CHECKS.md); first responses should be collected before using the [public teacher-targeted key](teacher/KEY-AND-NEXT.md). Each of ten days has a timed launch/model/guided/choice/response sequence, three representation routes to the same reasoning, an alternative domain, an optional/home extension and a specific response move. A teacher still has to choose fit, provide individual accommodations, verify syllabus/version and design the school's formal assessment.

I checked the source map against QCAA's current subject page and PDF, especially Unit 1 Topic 1 printed p. 15. The lesson sequence deliberately stays inside selected consumer-arithmetic elements. It does not teach overtime/allowances, government income support, exchange or dividend/P-E calculations and does not cover the full 14-hour sub-topic. The worked key does not pretend these quick checks are the school's Unit 1 assessment program.

## Learner pass

I read Card E without the key, used the “excluding → including” price ladder to compute the fictional `$84×0.10=$8.40` and `$84+$8.40=$92.40`, then used the reverse direction to check `$121÷1.10=$110` and GST `$11`. The “fully taxable” condition and real-product classification limit were apparent in both card and aid. I also followed the paper budget route: fixed `$680`, essential `$220`, discretionary `$110`, total `$1,010`, unassigned `$250`; no personal figures were requested. Calculator, AAC/read-aloud, large print and counter routes are described, but actual accessibility with an individual learner has **not** been observed.

For Day 19 I opened the optional offline [budget sheet](print/budget-what-if.xlsx) through LibreOffice's headless renderer. Its three formula rows calculated `$250/$205/$245` and `MEETS`. In a temporary copy outside this pack I changed only B's variable-essential input from `$250` to `$260`; the output recalculated to `$195` and `BELOW`. The paper Card G still carries the mathematical task when software is unavailable. This test proves a spreadsheet formula works in that renderer; it does **not** prove a student used the file.

## Funder/reuse pass

I could identify the official syllabus version, source pages, nine Topic 1 bullet locations, exact coverage limits, original content, font licence and reuse terms in [source/rights files](SOURCE-AND-CROSSWALK.md). The source PDF was read through the official rendered web result; command-line download returned HTTP 403, so there is no false QCAA file hash. This is a reusable two-week **partial** teaching pack, not a completed Year 11 curriculum or validated school outcome. Its original cases/visuals can be freely adapted with attribution; QCAA/ATO material has its own rights and no endorsement is implied.

## Print, arithmetic and repair notes

Five original SVGs and PDFs were generated at A4. I rendered all five PDFs to a contact sheet and visually inspected headings, conditions, answer spaces, contrast, page edges and footer. Each PDF has a selectable-text layer, a matching SVG title/description and a full [text/tactile alternative](print/TEXT-ALTERNATIVES.md). I also exported the optional spreadsheet to **A4 landscape PDF** and inspected it. The first spreadsheet print was letter sized and compressed its result labels; I changed the export setup and result alignment, then re-rendered. Check A initially reused one learner-card sales value; I changed it to `$900`, recomputed commission to `$45` and shift total to `$235`, and kept its worked key in sync. Arithmetic is independently recomputed by the local verifier. Tactile production, Braille translation, multilingual translation, real-user inspection and a real classroom trial remain **unperformed**.