Sleep problems affect many children with autism spectrum disorders (ASD) and are a major concern for parents of these children. Many studies of sleep problems in ASD have focused on young children, with less understood about the treatment of sleep problems in adolescents/young adults with ASD. Sleep problems can negatively impact daytime functioning in adolescents/young adults, including social challenges, hyperactivity, and daytime sleepiness, and can also affect family stress. Treatment of sleep problems with medications is not always successful and often has adverse side effects. Treatments that educate the adolescent/young adult, along with parents, on how to improve sleep patterns are an innovative opportunity to improve not only sleep but daytime functioning and family stress. We propose an education-based program to improve sleep in adolescents/young adults with ASD. The goals of this program are to assess the impact of the program on both nighttime sleep and daytime functioning. Following completion of questionnaires and wearing of an actigraphy watch, adolescents/young adults and their parents will be involved in 2 one-hour individual sessions and 2 follow-up phone calls. These sessions will focus on daytime habits, bedtime routines, sleep timing, relaxation techniques, and other strategies. After the sessions are complete, measures obtained at baseline will be repeated to assess whether the intervention improved nighttime sleep and daytime functioning.