The eight models described in Part three represent comprehensive, evidence-based programs for the treatment of persons with ASD, from infancy through adulthood. Programs reviewed include the Lovaas Institute, Koegel Center, Strategic Teaching and Reinforcement Systems (STARS), Project DATA, New England Children's Center, May Institute, Princeton Child Development Institute, and Judge Rotenberg Center. Strategies explained include intensive early behavioral intervention, Pivotal Response Training, verbal behavior, script fading, social stories, visual activity schedules, functional analysis, the Picture Exchange Communication System, and the Family-Teaching Model.