An abundance of research links children's social-emotional competence with positive school and life outcomes, but many barriers to widespread, high quality social-emotional learning (SEL) exist. Studies also found SEL delivered consistently and in coordination with other programs, both in and out of school, is more effective, but lack of unified standards, a supportive framework, and systematic approach prevent consistency and coordination of delivery. Process monitoring and impact evaluation help overcome barriers and improve implementation. After-school programs provide opportunities for quality SEL delivery and evaluation. This chapter reports results of an evaluation comparing pre- and post-program survey data from elementary school children (n = 98) in an after-school program that has incorporated an SEL curriculum. Results showed significant increases in the SEL competencies of self-management, social awareness, and social skills. The author also explored advantages of providing both SEL instruction and low-cost evaluation in after-school care settings in addition to schools.