The investigators are testing the efficacy of a family-based preventive intervention, which began when the children were age 2, with children at risk for developing significant conduct problems. Families who were originally recruited from Women, Infants and Children (WIC) were randomly assigned to a family-centered intervention developed by Dishion and colleagues (Dishion & Kavanagh, 2003; Dishion & Stormshak, 2006) referred to as an 'ecological approach to family intervention and treatment' (EcoFIT). The current study expands the Early Steps intervention into the elementary school years beyond what is currently available for a WIC service delivery venue, in which children are no longer eligible for services at age 6.