The rapid expansion of early home visiting across the country has dramatically increased the level of public investment at both the state and, more recently, federal levels. Begun in 2008, the federal Supporting Evidence-Based Home Visiting to Prevent Child Maltreatment (EBHV) initiative underscored the importance of states creating an infrastructure that would ensure that such increased investments resulted in sustainable, high quality, evidence-based home visiting programs. The EBHV program includes 17 subcontractors from 15 states. The home visiting models selected by the EBHV subcontractors for replication include Healthy Families America (HFA), Nurse Family Partnership (NFP), Parents as Teachers (PAT), SafeCare, and Triple P. Each subcontractor focuses on initiating or expanding the provision of one or more of these home visiting models and creating an infrastructure to sustain implementation beyond this immediate funding. As part of its cross-site evaluation of this initiative, Mathematica Policy Research, in partnership with Chapin Hall at the University of Chicago, developed a common framework that states could use to monitor program implementation and fidelity across multiple evidence-based home visiting programs. Three core research questions guided the study: 1. Were the evidence-based home visiting programs selected by the subcontractors implemented and delivered with fidelity? 2. To what extent did the subcontractors modify national models to respond to their target populations and local service delivery contexts? 3. What contextual factors were associated with fidelity of implementation? (author abstract)