This was recommended to me by Anna Williams (LT Trainer at Regent’s Uni) and is definitely worth a read:
“The Accessibility Toolkit is a collaboration between BCcampus and CAPER-BC. The goal of the Accessibility Toolkit is to provide the resources needed so that each content creator, instructional designer, educational technologist, librarian, administrator, teaching assistant, etc. has the opportunity to create a truly open and accessible textbook. An open textbook that is free and accessible for all students”.