Making your digital materials accessible can help anyone with a documented disability, but it will also help everyone: people developing their English language skills, people using older technologies to access the internet, people in very loud or very quiet environments where speech is difficult or impossible to understand, for example.
Why Accessibility?
Video example of what using a screen reader is like
Guides to Accessibility in Canvas
ALT-Tag Decision Tree - This decision tree describes how to use the
altattribute of the<img>element in various situations. For some types of images, there are alternative approaches, such as using CSS background images for decorative images or web fonts instead of images of text.