This chapter contains sections titled: What Is Social-Emotional Development? Why Is Social-Emotional Development Important? Why Is Early Social-Emotional Learning Important? What are the Characteristics of Effective Intervention Programs? How Do We Teach Social and Emotional Skills to Children? How Do Curricula Provide Direct Instruction to Children? How Do We Train Teachers to Facilitate Children's Social and Emotional Development? What Content Is Commonly Included in Teacher Training? How Do Social and Emotional Interventions Involve Parents? What Factors Contribute to Successful Outcomes in Implementation of These Programs? Environmental Factors Teacher Factors Child Factors Summary and Future Directions Acknowledgments References