This report highlights evaluation findings for four 2012 summer learning programs in the state of Massachusetts. Child-level assessment, program observations, interviews with site directors, teachers, and parents provided data for evaluation. A summary of research findings reported improvements across all domains, particularly in the test categories of both Mathematics and Communications and Relations with Adults. Recommendations include: continue to strengthen the STEM (science, technology, engineering, and mathematics) content curriculum; balance youth existing knowledge with new skill building; provide more leadership and choice opportunities for youth; maintain transparent and open communication; and maximize the unique contexts offered by each of the program sites.