Accessibility

Last updated October 22, 2026

ClassDa.sh is a shared screen a whole class reads at once, so it has to work from the back row, for early readers, for children who see colour differently, and for the teacher who runs it. These pages (About, the pages for teachers, administrators and IT teams, Privacy, Terms and this one) aim to meet the Web Content Accessibility Guidelines (WCAG) 2.1 at level AA. The board itself is still working toward that; what's missing is listed below.

What we do

• Readable type. Text uses Atkinson Hyperlegible, designed by the Braille Institute so letters like I, l and 1 are easy to tell apart. Sight words use Andika, a typeface made for beginning readers.
• Big where the class reads. The schedule, the learning target and the tools are sized to read from across the room, and the whole board scales to fit any 16:9 screen.
• Strong outlines. Light text sits on deep backgrounds, and coloured pieces have thick dark outlines.
• Sound always has a picture. A timer at zero also shows a message and turns red; the noise meter shows its level; every sound can be turned down or off.
• Either hand. Settings can mirror the board so the teacher's controls sit on the left.
• Calm mode. Settings → Look has a calm mode: less motion (the background doodles and the wiggle in Edit buttons and seat moving stand still), no confetti, and softer sounds. It follows your device's reduce-motion setting unless you turn it on or off yourself.
• Names said right, ages never shown. Each child can have a pronunciation note in their menu, and a child's age is never displayed. A −1 is never shown on the board.
• Laptop keys. Arrow keys move through slides and sight words, the calculator takes typing, and Esc puts a tool away.

Known limitations

• Screen readers. Most board buttons are pictures with short words under them, and they don't yet have full labels for screen readers. The board is meant to be seen by the room; the reading pages work with screen readers.
• Keyboard focus. Not every board control can be reached with the Tab key yet, and focus isn't always clearly outlined.
• Small teacher controls. The controls on the teacher's side are deliberately small so the class's side can be big. On a touch board they can be a stretch; running the board from a laptop with Present helps.
• Colour signals. The traffic light is colour by design (it also keeps red on top, yellow in the middle and green at the bottom), and a picked child's tile is shown with a yellow border.

Tell us

If something on ClassDa.sh is hard to use for you or your students, please email david@classda.sh. We read every message, and accessibility fixes go to the front of the line.