With the increased number of children being diagnosed with Autism Spectrum Disorders, parents and professionals are in search of materials that provide information to better understand children affected. While in the past individuals who were diagnosed had limited verbal and intellectual skills, newly diagnosed children often have good language skills and even areas of giftedness. This A-to-Z work contains original entries on the topic of autism spectrum disorders. These entries include facts about disabilities, personal and historic perspectives, interventions, assessments, educational methods, trusted internet resources, and national organizations, and it outlines the contributions of founding researchers and other professionals. It also includes lesson plans that can be implemented in a home, school, or community setting. Also included are personal perspectives from individuals with ASD and their parents. No such definitive resource exists that provides both educational and practical information related to ASD.