This Course Accessibility Checklist by DO-IT (Disabilities, Opportunities, Internetworking, and Technology) will give you a some considerations for checking the accessibility of your entire course.
Resources from Disabilities, Opportunities, Internetworking, and Technology (DO-IT, University of Washington)
University of Washington's DO-IT website offers a wide range of resources targeted especially for the questions that many instructors have regarding accessibility. Below are just a few of the questions you may have about accessibility in your course.