This document provides an overview of autism spectrum disorders (ASD) including what they are, who they affect, common signs and symptoms, potential causes, and implications for students and teachers. Some key points: ASD is a developmental disability causing social, communication and behavioral challenges. It affects each person differently, from mild to severe. Boys are more likely to be affected. Teachers should understand ASD to help students be successful by maintaining routines, using visual supports, and getting help from special education staff. The goal is for students with ASD to be educated inclusively whenever possible.