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Computers & Digital Literacy · Grade 11

Accessible Product Design and User Testing

This advanced course follows the Cedar Valley Library's design team as it tests and repairs its new study-room booking page. Learners compute usability metrics (task success rate, time on task, error rate and post-task ease ratings), plan an ethical, inclusive test with disabled participants, informed consent and non-leading tasks, audit accessibility through the keyboard path, accessible names, contrast ratios, captions and reflow, and then prioritize findings by severity and frequency before retesting.

  • 4 lessons
  • About 115 minutes
  • Check what you learned: 10 questions
  • Ways to answer: choose an answer, highlight a text, match pairs, type a number, put in order and sort into groups
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What learners will discover

  • Compute and interpret usability metrics: task success rate, time on task (using the median), error rate and a post-task ease rating, with appropriate caution about small samples.
  • Plan an ethical, inclusive usability test: recruit diverse participants including disabled users, obtain informed consent, and write realistic, non-leading tasks.
  • Audit a product's accessibility by checking the keyboard path, accessible names for screen readers, contrast ratios, captions and transcripts, and reflow at high zoom.
  • Prioritize findings by severity and frequency, treat blockers as top priority, and iterate by fixing and retesting against the same metrics.

Lessons

  1. Measuring usability 7 steps4 practiceabout 28 min
  2. Planning an ethical, inclusive test 6 steps4 practiceabout 28 min
  3. Auditing accessibility 6 steps4 practiceabout 30 min
  4. Prioritize, fix and retest 7 steps3 practiceabout 29 min
  5. Check what you learned 10 questions at the end

Keep exploring

More 11th grade computer skills

Guide for grown-ups