When adding links to documents or slides, there are some specific things you can do to optimize accessibility. Because screen-reading software reads the links presented on a page as words or letters, it is important to make links meaningful and relevant. Links that say “click here,” for example, do not allow users to discern what a link is about.
This web page from the University of Minnesota gives some good examples and tips for creating meaningful hyperlinks. You may also request training from Instructional Design and Training (IDT).