Open Circle, a curriculum-based program for youth in kindergarten through grade 5, is designed to strengthen students’ social and emotional learning (SEL) skills related to self-awareness, self-management, social awareness, interpersonal relationships, and problem solving and to foster safe, caring, and highly engaging classroom and school communities. Open Circle aims to increase students’ prosocial behaviors (e.g., including one another, cooperating, speaking up, calming down, expressing anger appropriately), reduce students’ problem behaviors (e.g., disrupting class time, teasing, bullying, fighting), and facilitate students’ adjustment to middle school.