The California Performance Assessment Collaborative (CPAC) represents educators, policymakers, and researchers who are working to study and advance the use of authentic approaches to assessment, such as presentations, projects, and portfolios, which require students to demonstrate applied knowledge of content and use of 21st century skills. In collaboration with the Learning Policy Institute, CPAC captures and documents lessons that inform educators seeking to implement performance assessments in their schools, districts, and networks. Research findings from the collaborative also provide local, state, and federal policymakers with important information and context as they develop next-generation assessment and accountability policies.