Computer science · Grades 7–12
Designing digital work for more users · Revision card
Important information should not rely only on colour, sound or images.
Understand the idea
Multiple ways to perceive
Important information should not rely only on colour, sound or images.
Multiple ways to operate
Controls should be usable without requiring one particular input device.
Describe purpose
Clear labels and meaningful text alternatives help users understand content.
Worked examples
Which design communicates an error without relying only on colour?
The information remains available when colour is not perceived.
An error message and icon alongside the colour change
Why should a form field have a clear label rather than only placeholder text?
Credit clarity and programmatic/visual association.
A label identifies the field consistently and can remain visible while the user enters information.
Explain without looking
- Explain why testing with only one device and one user does not establish accessibility.
Further reading and review references
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Preview material · independent educational review required. Grade bands are approximate, not official curriculum alignment.