Accommodations are changes in testing materials or procedures that enable students to participate in assessments in a way that allows abilities to be assessed rather than disabilities. They are provided to "level the playing field." Without accommodations, the assessment may not accurately measure the student’s knowledge and skills. This short resource from NCEO introduces the topic.
This resource is a part of the Tool Kit on Teaching and Assessing Students with Disabilities – Parent Materials (2004, Archived).