Collective Impact initiatives are growing in currency in many sectors- including the field of arts education. Working together across organizations has become more than just about effective partnerships, it is a shift in how we organize our collective work, optimize often limited resources, and make reliable improvements across complex and varied contexts. Of the five common conditions for collective impact, a shared measurement system is the most germane to evaluation. This panel will feature collective impact backbone organizations and network hubs in the arts education field who are learning how to do this complex work together. Fostering measurement know-how, establishing routines of data use and strategic learning, and co-developing shared systems of data collection and reporting are the central activities. Making sure that the measurement system is reliable, focused, and flexible enough for varied use across contexts is the design challenge for the evaluation field.Discussant, Presenter 1: Patricia Moore Shaffer, NEAChair, Presenter 2: Don Glass, The Kennedy CenterPresenter 3: Stacy Hughey Surman, University of AlabamaPresenter 4: Steven Shewfelt, InGenuity