This document from the National Accessible Educational Materials (AEM) Center lists the critical components of quality indicators for the provision of accessible educational materials (AEM). In it, the AEM Center defines and explains the critical components of each quality indicator and includes them in this document. The goal is to clarify quality indicators to the state and local education agencies (SEAs and LEAs) which plan, implement, and evaluate AEM in their states/districts.
http://aem.cast.org/policies/quality-indicators-provision-aem.html#.WZXQsCh96Uk