“Collaboration is important for effecting large-scale changes, but it is difficult, time-consuming, and requires sustained effort on the part of all collaborating parties. Collaboration among organizations within a single sector (education, policy, or advocacy, for example) is easier than collaboration across sectors, where differences in language, expertise, expectations, and goals can be barriers to shared outcomes. Improving our collective response to climate change is an outcome shared across sectors, providing an opportunity for cross-sector collaboration. The Climate and Urban System Partnership is a network of cross-sector organizations in four cities, with each city forming a local Community of Practice, a group of learners coming together to try new things and learn from each other. [In this webinar], we present findings from the first two years of this CCEP-II project, including results from learning sciences, evaluation, and design studies in Pittsburgh, New York, Washington, DC, and Philadelphia.”