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 8-10 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