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EdTech · Accessibility · K-12 publishing

Alt text at scale for a K-12 publisher

Context-aware alternative text for images, charts and complex media across a K-12 catalogue, drafted with AltOne and edited by trained describers.

ServicesDigital content & media accessibility
ProductAltOne

The challenge

One of our key clients required accessibility enhancement for a large repository of educational images that lacked meaningful alternative text, affecting usability for visually impaired learners.

  • Missing alt text: 35,000 images lacked appropriate descriptions.
  • Accessibility compliance risk: exposure to WCAG violations.
  • Lack of contextual accuracy: alt text needed educational relevance, not just description.

The approach

  • Hybrid alt-text authoring: expert-led manual creation combined with AI validation.
  • Contextual layering: image purpose, location and the associated learning content informed every description.
  • QA validation: accessibility auditors reviewed the output to ensure compliance.

The results

  • 80%+ accessibility boost across the image repository.
  • Seamless integration: descriptions delivered into the client’s existing content pipeline.
  • Improved learner experience for screen-reader users, with WCAG exposure removed.

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