Key things to remember
- Alternative text for images
- Tables might not be accessible
- Ensure link titles are meaningful
- Remember the Notes panel might not be accessed
- Use sufficient font sizes
- Check the contrast of text colours
- Avoid automatic slide transitions
- Provide captions and/or transcript for embedded video and audio
- Avoid animation in slides
Office 2013 has an in-built accessibility checker that can highlight potential issues with your document.
File > Info > Check for Issues > Check for Accessibility
The check includes clear instructions on how to fix any issues it returns.
Keep in mind the accessibility options in Powerpoint are quite limited. Consider producing an accessible PDF as an an alternative.