What happens when teams from 57 cities building afterschool systems gather to discuss two key system responsibilities--improving afterschool programs and using data for informed decision-making? Lots of rich discussion. This report covers a national afterschool conference held in February 2013. It details what mayors, program providers, system leaders, researchers and others had to say on matters ranging from how to measure afterschool performance to how to boost program quality. [This conference was organized by: American Youth Policy Forum, The Collaborative for Building After School Systems, The Forum for Youth Investment, the National League of Cities Institute for Youth, Education & Families, and the Wallace Foundation.]