The document discusses accessible instructional materials (AIM) which are textbooks and core materials provided in specialized formats like Braille or audio for students with print disabilities. It covers the legal requirements for AIM under IDEA, considerations for determining student need and selecting appropriate formats, and sources for obtaining specialized materials including the National Instructional Materials Access Center (NIMAC). It also describes the work of the AIM Consortium in increasing awareness and provision of AIM through guidelines, training, and technical assistance.