This article describes the evolution of full service schools. Full service schools stress prevention, collaboration and systems change. Prevention is geared toward corrections, mental health and welfare, all topics of keen interest to people working in and studying criminal justice. By providing mental health services at the school for both children and families, interventions for families may be done and prevention for children accomplished. This is especially important because so many parents of the children we work with in these schools are incarcerated either in prisons or psychiatric hospitals. With early intervention, the hope is to keep the children from continuing this heinous process of hospitalization or prisonization. At the same time that this occurs, we should be able to keep many of their families off welfare since their parents are not incarcerated and are bringing in a paycheck. (Contains 1 figure.)