This series is part of the Annie E. Casey Foundation’s multi-year effort to develop a “results-based accountability” (RBA) approach to its K-12 education portfolio. Though still a work in progress, the Foundation’s experience with RBA can help other philanthropic organizations and individual donors develop their own approaches to producing and documenting the results of their investments. Public Impact’s Sarah Crittenden and Bryan Hassel have been helping the Foundation with a series of reports on its approach. The first describes the Foundation’s overall approach to RBA. The second explains the Program’s vision, theory of change and theory of action. The third is a guidebook to help Program grantees understand performance measurement, select performance measures, set performance goals, and report performance results. It also includes an Excel template for reporting on performance measures.