This report summarizes the results of a project by the Center on Education Policy (CEP) that explored how education leaders, practitioners, and the research community might work together more effectively to advance the use of evidence in school improvement. In particular, the project focused on how to support states and school districts as they implement the evidence requirements of the Every Student Succeeds Act (ESSA). Under ESSA, states have more flexibility than under previous federal law to identify which schools are low-performing, and districts have more latitude to decide on strategies to improve these schools. This report, the third in a series, analyzes information across the three main project activities: (1) a meeting of policy experts, researchers, and state and local education leaders hosted in July 2019 by CEP and the National Academy of Education; (2) interviews about the ESSA evidence requirements with leaders in seven states; and (3) interviews about the ESSA evidence requirements with leaders in five school districts. [For "State Leader Interviews: How States Are Responding to ESSA's Evidence Requirements for School Improvement," see ED597203 and "District Leader Interviews: How School Districts Are Responding to ESSA's Evidence Requirements for School Improvement," see ED602938.]