This study investigated the sustained impact from elementary fullservice community school programming on middle school STEM academic outcomes that could lead to greater college and career readiness, as well as increased STEM career options for underserved urban students. Quantitative findings suggest middle school youth who attended an elementary full-service community school performed better on middle school STEM outcomes and were predicted to be more prepared to graduate and enter a STEM-related field than a matched comparison of peers who did not. Qualitative results explain differences. Two meta-inferences, informal facilitation of STEM and sustained fullservice community school impact, frame the discussion.