# Five A4 aids · exact text and tactile/paper equivalents

These are write-on **original vector SVG/PDF diagrams**. Their boxes are labelled with text as well as colour, the SVGs have title/description, and the PDF text is selectable. The descriptions below allow screen-reader, enlarged-text, oral/AAC and tactile adaptation. They do **not** claim that embossed or Braille editions or real-user accessibility testing have been completed. Use [Cards H–N](../LEARNER-CARDS.md) for full fictional conditions and [the public worked key](../teacher/KEY-AND-NEXT.md) only after a first response.

## Wage layers · [SVG](wage-layers.svg) · [PDF](wage-layers.pdf)

Heading **WAGE LAYERS**; subtitle says multipliers and counts attach to the right rate. Upper Card H box has four blank rows: `REGULAR: 8 hours × $28/hour`; `ADDITIONAL RATE: $28/hour × 1.5`; `ADDITIONAL: 2 hours × new rate`; `GROSS MODEL TOTAL`. Lower Card I box has `REGULAR: 6 hours × $31/hour`; `ADDITIONAL: 2 hours × (1.25 × $31/hour)`; `ONE-SHIFT ALLOWANCE: $24`; `GROSS MODEL TOTAL`. The printed caution says model multipliers are not real legal pay rates. **Tactile route:** use separate labelled trays for regular hours, additional hours and a once-only allowance token. Match each count to a per-hour rate before adding amounts. Do not rely on the blue/green colours.

## Two percentage bases · [SVG](markup-margin.svg) · [PDF](markup-margin.pdf)

Heading **TWO PERCENTAGE BASES**. Upper Card J panel: mark-up uses cost $80 as base; `80 × 0.25 = gap ____`; `cost + gap = price ____`; reverse `price − cost = gap`. Lower Card K panel: cost $72, price $90, gap $18; `mark-up = 18 ÷ 72 × 100 = ____%`; `margin = 18 ÷ 90 × 100 = ____%`. Footer: a price gap is not proven net profit. **Tactile route:** use an $18 raised strip, place it first beside a labelled $72 cost strip and then a $90 selling-price strip. Keep denominator labels attached to each operation.

## Change ladder · [SVG](change-ladder.svg) · [PDF](change-ladder.pdf)

Heading **CHANGE LADDER**. The figure is invented, not inflation data. Top: Version 1 $125; Version 2 $137.50. Forward box: `$125 → $137.50`; `difference ____ ÷ starting $125 ×100`; percentage increase blank; reverse-check sentence. Return box: `$137.50 → $125`; `difference ____ ÷ starting $137.50 ×100`; percentage decrease blank; same dollar difference, different starting base. **Tactile route:** use one fixed $12.50 difference strip and two different base strips, each explicitly labelled “from.” Put the strip beside each base in turn.

## Exchange directions · [SVG](exchange-directions.svg) · [PDF](exchange-directions.pdf)

Heading **EXCHANGE DIRECTIONS**. The exercise rate is **invented**: AUD $1 = USD $0.64, with no fees or spread. Forward box: `AUD → USD: multiply by 0.64`; `AUD $250 ×0.64 = USD ____`; reverse check `USD result ÷0.64 = AUD ____`. Reverse box: `USD → AUD: divide by 0.64`; `USD $96 ÷0.64 = AUD ____`; reverse check `AUD result ×0.64 = USD ____`. Footer says this is not a quote and real fees/rates are unknown. **Tactile route:** give labelled AUD and USD currency cards and one factor card marked `USD 0.64 per AUD 1`. Keep source and target cards on opposite ends of each physical arrow; move them and reverse the operation for the return direction. [Optional offline rate switch](rate-switch.xlsx) contains these same inputs plus a changed invented rate; paper/card route is mathematically equivalent for the main conversion.

## Share measures · [SVG](share-measures.svg) · [PDF](share-measures.pdf)

Heading **SHARE MEASURES**. Upper Card N1 box says $24/share, $0.84 annual dividend/share, 50 shares; blanks for `50×0.84` annual dividend dollars and `$0.84÷$24×100` yield. It reminds users to match one-share dividend and one-share price, with no future return guarantee. Lower Card N2 box says Cedar `$30 price ÷ $2 annual earnings/share = ____` and Slate `$36 ÷ $3 = ____`; P/E is a ratio, not a percentage. Footer: a single measure cannot recommend a share purchase. **Tactile route:** pair one dividend token with one price token for yield; put 50 dividend tokens into a separate portfolio tray for total dollars. For P/E, make repeated EPS tokens up to the stated price and count groups. Avoid an investment ranking.

## Offline interactive · [rate-switch.xlsx](rate-switch.xlsx)

This file is not connected to a market. Column headers, left to right: Model; USD per AUD $1; AUD input; USD output; USD input; AUD output; Rate status. First row is Card M with `0.64`, `AUD250`, `USD96`; second row offers an invented `0.80` for the same inputs. Yellow cells are editable invented inputs. USD output formula is `AUD input × rate`; AUD output is `USD input ÷ rate`. Directions and no-live-quote warning appear below the table. The learner can change only the rate, predict both outputs and compare. Card M and the exchange diagram supply the same reasoning without software. Do not enter personal transactions. Screen-reader and spreadsheet behavior should be confirmed with an individual user; this file has only been desk-tested in LibreOffice.