The National Center on Accessible Instructional Materials! This site serves as a resource to state- and district-level educators, parents, publishers, conversion houses, accessible media producers, and others interested in learning more about and implementing AIM and NIMAS. AIM Center at a Glance For students with sensory, physical, cognitive, or learning differences and their teachers, accessible instructional materials (AIM) may open doors to teaching and learning that ordinary print-based materials have closed. Accessible instructional materials or AIM are specialized formats of curricular content that can be used by and with students who are unable to read or use standard print materials.