In the Communities of Learning for Urban Environments and Science (CLUES) project, the four museums of the Philadelphia-Camden Informal Science Education Collaborative worked to build informal science education (ISE) capacity in historically underserved communities. The program offered comprehensive professional development (PD) to Apprentices from 8-11 community-based organizations (CBO), enabling them to develop and deliver hands-on family science workshops. Apprentices, in turn, trained Presenters from the CBOs to assist in delivering the workshops. Families attended CLUES events both at the museums and in their own communities. The events focused on environmental topics that are especially relevant to urban communities, including broad topics such as climate change and the energy cycle to more specific topics such as animals and habitats in urban neighborhoods.