If you are using PowerPoint in your OER you need to determine if they are accessible.
The PowerPoint Accessibility Checker helps you find and fix accessibility issues. It creates a report of the issues it finds, and explains why each issue might create a problem. Finally, it tells you how to fix the issue.
To run the accessibility checker in Windows:
To run the accessibility checker on a Mac:
If you get a message saying "Unable to run the Accessibility Checker. Cannot check the current file type for accessibility issues" it just means the file has not been saved to the newest "pptx" version.