This chapter describes the role of supplementary education–typically, a form of additional structured education that takes place outside of the school classroom–and how it can prepare learners for high academic achievement and effective engagement in the process of learning that is key to academic success. The idea of supplementary education is based on the premise that beyond exposure to the school’s formal academic curriculum, high academic achievement is closely associated with exposure to family and community-based activities and learning experiences that occur outside of school. The chapter presents the rationale and need for supplementary education. Related types of supplementary education include those that are implicit parenting, nutrition, family talk, parental employment, decision making, reading along with the children, socialization and acculturation, social networks, travel, and environmental supports, and those that are explicit (academic development, tutorials, advocacy, remediation, one-on-one tutoring SAT preparation, Saturday academies, specialized services, socio-cultural and child-centered social groups).