Recess is an important and unique component of the school day, and yet there is a relative paucity of research on its impact on young children. Moreover, recesses are often perceived negatively by educators because they can detract from academic instructional time and, depending on the kind of play and interactions between students, may also be times of social conflict and, in some cases, exclusion and bullying. This article examines several facets of recess and its importance: it outlines what students do at recess and the social processes that take place, as well as challenges specific to recess time, and its impact on social-emotional learning. It then reviews what constitutes a high-quality recess and synthesizes scholarship on the effectiveness of recess interventions around the world. The article evaluates whether recess is ultimately a help or a hindrance to young children's social-emotional development, and concludes with both policy and practice recommendations for educators.