In their creation of online courses, instructional designers may inadvertently overlook the needs of learners with disabilities. However, creating accessible online courses isn’t merely a "nice to do" activity; it is required by federal law. Section 504 of the Vocational Rehabilitation Act of 1973, for example, specifically prohibits discrimination against individuals with disabilities by any federal agency receiving federal funds; this includes colleges and universities.
Huglin, Linda; Rist, Shannon; and Casper, Bob. (2011). "Maximizing Accessibility in Online Courses". IEEE Learning Technology, 13(2), 16-18.