Expanded learning intermediaries are nonprofit organizations dedicated to making after-school and summer programs better and more accessible for children and youth. They do this by coordinating efforts and resources in a given community, knitting programs together into a cohesive system, helping individual programs function at a high level, and pushing the system as a whole to provide the greatest benefit to as many young people as possible. In 2014, Every Hour Counts, a national coalition of expanded learning intermediaries, released a measurement framework to help communities think about what data to collect, how to collect them, and how to use them. The framework also aims to guide intermediaries on how to use the data to coordinate continuous improvement efforts, how program efforts can improve youth outcomes, and how to identify system strengths and areas for improvement. Every Hour Counts then engaged the RAND Corporation to evaluate efforts in three cities (Boston, Massachusetts; St. Paul, Minnesota; and Providence, Rhode Island) to put the framework into practice. This guide draws from the RAND evaluation with Boston After School & Beyond, Providence After School Alliance, and Sprockets. It offers practical, research-based advice to those in the expanded learning field who work with data, or want to work with data. [This report was commissioned by Every Hour Counts.]