There is increasing recognition of the need for evaluations that identify program processes or mediators and assess degree of program implementation rather than focusing solely on outcome evaluation. This paper describes the application of complementary qualitative and quantitative evaluation procedures to assess the degree of implementation of multi-component family support programs for improving educational outcomes for at risk youth, and to assess the relationship between program implementation and outcomes. The qualitative evaluation involved prolonged engagement to identify common program domains or mediators. Using a method called Innovation Configuration Analysis, levels of implementation of program domains were explicated as well as an overall Implementation Fidelity Index. Strong positive relationships were found between overall program implementation and program-level outcomes achieved by student participants. (Contains 7 tables.)