While successful joint use partnerships can be found across California and the country, lack of information, guidance, and best practices keep many localities from pursuing this collaborative strategy. CC&S partnered with Public Health Law and Policy (PHLP) to conduct initial research on joint use school facility partnerships in California. Our report looks at joint use partnerships in the California policy context, focusing on three cases: opening up existing school yards for public use in San Francisco; building new joint use gymnasiums in Rosemead; and building a joint use child development center in Clovis (appendices include formal case agreements). The report provides key lessons learned and recommended steps to crafting effective joint use partnerships.