Accessibility

Trident Calculator · Last updated: October 2026 (draft)

We want every student to be able to use Trident, including students who use screen readers, keyboards, switch control, zoom or high-contrast settings.

What works today

• Every calculator key and control has a spoken name. Results are read aloud by screen readers (VoiceOver, TalkBack, ChromeVox, NVDA, JAWS).
• You can use the whole calculator from a physical keyboard. Focus is always visible.
• There is a high-contrast skin, plus light, dark and system appearance.
• Text and controls scale with browser zoom and system text size.
• The app is in 15 languages, with a right-to-left layout for Arabic.
• No time limits, except an optional timer that you start yourself in exam practice.

Known gaps

• Calculator screens are drawn as images. Screen readers hear the current result, but not the full two-dimensional layout of a graph or matrix.
• Graphs have no text or audio description yet. The Table view lists the values meanwhile.
• Some decorative skins have low-contrast screen text. The high-contrast skin avoids this.
• The 3D shape viewer needs touch or a mouse to rotate.
• We have not had an independent audit yet.

Tell us

If something gets in your way, email [CONTACT]. Tell us your device, browser or app version, and what happened. We aim to reply within five school days.