We aim for WCAG 2.2 AA across the site and every tool. That means:

• Everything works with a keyboard, with a visible focus ring.
• Screen reader labels on controls and live announcements for results.
• Color is never the only signal.
• Large tap targets, and larger still for K-2 tools.
• Animations respect your device's "reduce motion" setting.

Some tools are visual by nature, like a 3D atom or a map. We describe what's on screen wherever we can and keep improving. If something doesn't work for you or your students, we want to know.