Research findings from an analysis of the National Child Traumatic Stress Network’s Core Data Set examining patterns of adverse childhood experiences across three developmental periods and risk for adolescent psychopathology and functional impairment. Authors are Damion Grasso, Ph.D., Carly Dierkhising, M.A., Chris Branson, Ph.D., Julian Ford, Ph.D., and Robert Lee, M.A. Versions of this talk have been presented at the NCTSN Annual Network Conference and the Society for Research on Adolescents.