"The focus of many open education projects is to provide access to education. But what does access mean? If the materials are not accessible for each and every student, do they fulfill the mandate to deliver fully open education? The open education movement has helped people in different parts of the world access content that they would otherwise not be able to view or interact with. Open education resources reduce costs for students and allow for greater flexibility for instructors. Accessibility can help push the movement even further forward."

- from the OER Accessibility Toolkit by Open UBC

Accessible OER Toolkits

The Inclusive Learning Design Handbook, part of the FLOE Project, offers context for accessibility issues, approaches for creating accessibility, and specific techniques to produce and assess accessible OER.
The OER Accessibility Toolkit, by Open UBC, walks through best practices for making OER fully open and accessible to every student.
The OER Accessibility Series and Rubric, by Affordable Learning Georgia, includes practical guides for accessible content and an evaluation tool for the accessibility of OER content created and/or used.

Specific Tools

Understanding Document Accessibility is a pressbook focused on accessibility in various Office documents.
The Creating Accessible OER collection, at OER Commons, gathers together various resources for accessibility in OER.