Summer learning programs provide academic instruction to students during the summer, often along with enrichment activities such as art, music, theater, sports, or outdoor activities. Programs typically spend one to two hours for each academic subject covered, and operate four to eight hours per day, four or five days per week, for four to eight weeks. Programs can also facilitate home-based reading, often with teacher-selected books and encouragement. Programs can be offered by school districts, national providers, or local community organizations. Programs often serve low-performing students, but may also serve all students. On average, students who do not participate in summer learning programs lose about a month of academic gains during the summer. (author abstract)