Evaluation of Adolescent Pregnancy Prevention Approaches: Design of the Impact Study

This report describes the impact study component of the Evaluation of Adolescent Pregnancy Prevention Approaches (PPA), which aims to expand available evidence on effective ways to prevent and reduce pregnancy and related sexual risk behaviors among teens in the United States. It includes the policy context and goals of the evaluation, the selection and key features of the program models and sites included in the evaluation, the impact study designs in each site, and the approach to estimating impacts and reporting results.