The number of U.S. children attending after-school programs has been steadily increasing. In 2014, the most recent year for which data were available, approximately 10.2 million students, representing about 23 percent of U.S. families, were enrolled in an after-school program. Of the students attending after-school programs, the majority do so at their own schools (43% at public schools and 11% at private schools), while child care centers and community and religious organizations operate most other after-school programs. Academic enrichment programs can be offered before or after school, on Saturdays and holidays, or during the summer, but the majority of programs take place after school. Program components range from academic lessons in the core content areas to recreational and enrichment activities. Most programs also include homework help and/or tutoring. This Information Capsule summarizes research findings on the best practices for developing high-quality academic enrichment programs. Research on the impact of participation in academic enrichment programs on students' academic performance is also reviewed. A sampling of after-school enrichment programs offered in states and school districts across the U.S. is provided. Finally, Miami-Dade County Public Schools' academic enrichment program is summarized.