This chapter describes an ecological approach to treatment called EcoFit that was inspired by research suggesting that the most successful integrative interventions are those which target multiple domains of children and families. In addition to describing the intervention model and its effectiveness in decreasing youth problem behavior, the chapter also discusses issues relevant to implementation in the school context. Students' disruptive behaviors at school can cause serious problems for teachers, parents, and society. The EcoFIT model was designed for implementation in schools and comprises specific components that facilitate parent involvement and family-school connectedness. The chapter talks about the components of EcoFIT that include the family resource center (FRC), the family checkup (FCU), and a structured menu of intervention options. Successful adoption and implementation of the EcoFIT model within schools involves several requisite components, such as school resources and infrastructure, proper training and implementation manuals, and program fidelity checks.