In November 2012, the Bill & Melinda Gates Foundation invested in seven innovative district-charter partnerships with "the potential capacity and commitment to accelerate student college ready rates through deep collaboration and sharing of best practices" (District-Charter Collaboration Grant Request for Proposal [RFP]). These partnerships brought together traditional public school districts with individual charter management organizations (CMOs) and local charter schools (and, in some cases, Catholic schools) in Boston, Massachusetts; Denver, Colorado; Hartford, Connecticut; New Orleans, Louisiana; New York, New York; Philadelphia, Pennsylvania; and Spring Branch, Texas. All seven sites received three-year grants intended to (1) facilitate collaboration on evidence-based solutions aligned with the Foundation's College Ready strategy; and (2) improve equity of access, resources, and accountability across district and charter schools. The grants ranged in size from approximately $2 million to $5 million. As part of the District-Charter Collaboration Grant program, the Foundation has contracted with Mathematica Policy Research to conduct an evaluation of its implementation and effects. This final report summarizes the full three-year implementation of the grants from December 2012 to December 2015. One appendix is included: Detail on Leadership Development Participant Selection and Training.