This document summarizes the history and requirements of digital accessibility laws and guidelines, common findings of non-compliance, and resources for improving accessibility of online instruction. It notes key laws and guidelines passed since 1973 aimed at ensuring those with disabilities can access the same information as others, including Section 504, ADA, and Web Content Accessibility Guidelines. Common findings of non-compliance include lack of alt text, inaccessible PDFs, missing captions, unusable video controls, and color/contrast issues. Resources are provided to help make online classes and materials accessible.