The definitive work on social and emotional learning (SEL) research and practice is now in an extensively revised second edition, featuring all-new and thoroughly updated chapters. The world's leading SEL scholars describe state-of-the-art interventions that build students' competencies for managing emotions, showing empathy for others, forming supportive relationships, and making responsible decisions. The scientific underpinnings of SEL are explored and its impact on academic achievement and behavior is examined. The "Handbook" discusses ways to assess SEL and design effective, developmentally and culturally informed programs for students in preschool through secondary school settings and beyond. New to This Edition: (1) Reflects a decade of significant advances in research, policy, and implementation; (2) New and expanded topics--equity, culturally responsive practice, multi-tiered systems of support, adult SEL, technology tools and applications, mental health, scaling up successful interventions, and more; (3) Six chapters on international SEL efforts, discussing both developed and developing countries; and (4) Every chapter concludes with Key Takeaway Points.