This article is a description of a program that may be effective for reducing the aggressive behaviors of adults with intellectual disabilities. Data are presented in the form of a naturally occurring multiple baseline across two participants. Results suggest that an intervention anchored in teaching-family model (TFM) procedures was effective to reduce the mean value of (a) physical aggression toward people or property and (b) verbal aggression. Quality-of-life data taken before and after participation in TFM indicated that quality of life improved for both participants. Social validity data indicated that parents, teachers, and employers were all highly satisfied with the program procedures and outcomes. (Contains 2 figures.)