Accessibility

The target is WCAG 2.1 AA. This page records what has been done and what has not.

Built in

Semantic HTML with one h1 per page and headings in order.
A skip-to-content link, visible on focus.
Keyboard operation throughout: the filters are real checkboxes in a real fieldset with a legend, and the search is a labelled input. Nothing needs a mouse.
A visible focus ring on every interactive element, in a colour that meets contrast against its background.
No meaning carried by colour alone. Prefix, root, and suffix are distinguished by shape and a printed word as well as hue, in the browser and on paper.
Result counts announced with aria-live when filtering changes them.
Touch targets at least 38 pixels tall.
Text reflows to a single column on narrow screens; no horizontal scrolling at common widths.
prefers-reduced-motion is respected.
Meaningful images carry alt text; decorative shapes are drawn in CSS and are not announced.

On paper

Every activity has a black-and-white edition designed for grayscale printing, not merely a colour sheet with the ink removed.
Body text on handouts is 12.5pt or larger, with writing lines about a third of an inch tall.
No large dark fills or heavy gray backgrounds, which degrade badly on a photocopier.

Known limitations

Screen-reader testing has been done with keyboard navigation and semantic review, not yet with a full pass in JAWS, NVDA, and VoiceOver.
The site is English-first. The architecture keeps content in JSON so translations can be added, but no translated edition exists yet.
Handouts are printable HTML rather than tagged PDFs.

Tell us what breaks

If something here is unusable with your assistive technology, that is a defect worth fixing. Report it through the About page for the Learning Activities Hub.