Understanding WCAG 2.1

This is the official W3C reference behind the WCAG 2.1 standard, walking through the intent, techniques, and common failures behind all 78 success criteria across levels A, AA, and AAA. Reading the sections that apply to your course materials lets you explain and defend a specific accessibility decision by citing the actual standard rather than a secondhand summary, which is exactly what a campus compliance review or a student's appeal will eventually ask for. It is the primary source every shorter guide already in this library is quietly built on.

Task

Accessible materials

Time

3 hours

Level

advanced

Cost

Free — Nothing to pay. A free account at most.

Tools

None in particular

Published

2026-02