In this "Equity by Design" brief, the authors describe the F.a.M.I.L.Y (Fostering and Maximizing Interdisciplinary Learning Year-round) Project and discuss the Project's importance and impact on Black girls and their caregivers. The brief ends with a discussion of strategies implemented during the F.a.M.I.L.Y Project to create a holistic and inclusive environment for STEM learning and positive STEM identity development.