Accessibility

Accessibility

The whole library is meant to work with a keyboard, a screen reader or a phone held sideways, and most of it already does. This page says what is built in, what falls short for now, and how to ask for an alternative.

What is built in

Every page has one heading structure, a skip link and visible focus. Equations are published three times over from one source: the drawn layer you see, a MathML twin a screen reader can walk through, and a plain-text line that copying yields. Every figure, animated ones included, carries a caption and an accessible name, and can be enlarged in a dialog a keyboard can open, close with Escape and return from. Animations respect your reduced-motion setting. The question practice works without a mouse, and the sketch box is optional: every question can be worked on paper and self-marked without it.

Known limitations

The printable workbook and card-pack PDFs are generated files and their internal tagging is not yet at the standard of the web pages; the same content is always available as ordinary HTML on the topic pages, which is the accessible route today. If a page, a figure or a download does not work with your setup, that is a defect rather than a policy, and we would like to know.

Another format, or a problem

Write to [email protected] and say which page and what you need. Reports of anything unusable with a screen reader, keyboard or switch device get fixed with the same priority as a wrong answer.