Accessibility personas
This site from the UK government includes a series of personas of people with different access needs and required supports. In addition to the personas are simulations where you try to complete tasks on websites as these people with disabilities experience them. You can see how poor design affects their ability to complete tasks, as well as see an improved design that makes it easier for users with disabilities to use websites. Even though this is more about general web content, a lot of this applies to elearning as well.