There are four defining characteristics of a Community Science Workshop: 1) CSWs are in neighborhoods: Each program maintains a permanent public space that is walking distance to low-income homes and schools. 2) CSW programs are open-ended and student-driven. 3) CSWs are open-door: drop-in hours minimize barriers to participating youth and families, and a variety of other programs provide multiple entry points in time and space: afterschool, during the day, on field trips to the CSW, and via mobile programs at rural locations. 4) CSWs strive to saturate their community with science: working with schools, community-based organizations, housing projects, libraries, municipalities and parks as needed to transform a community’s experience of science education.