Many faculty like to provide their students with the PowerPoint slides (or PDF versions) they use in their lectures, so students can follow along and take notes. PowerPoint files need to follow the same accessibility rules as Word documents. PowerPoint files tend to require more work, however, due to the higher number of images that usually fill the lecture slides. If you want to provide PowerPoint resources to your students, you need to make sure all the images contain alternative text, allowing visually impaired students to understand the content the image conveys.
If you are only providing your PowerPoint slides in the lecture videos, and not as separate files, you do not need to worry about alternative text, but you should still meet the remaining accessibility guidelines that improve visual