This report describes the major annual activities and accomplishments related to the cross-site evaluation across three RPG cohorts (RPG4, RPG5, RPG6) from October 2020 - September 2021. This report includes (1) a brief history of the RPG cohorts, (2) information on the RPG 4-6 projects, (3) an overview of the RPG cross-site evaluation, (4) highlights from the past year of the contract, (5) support provided to RPG projects during this period, and (6) next steps.