Early childhood is a critical period during which children learn to regulate and manage emotions and behaviors, develop and maintain social relationships, and interact effectively with others. In this chapter, the authors describe research-based supports for young children’s emotional well-being and positive behavior, promising strategies and interventions used in early care and education settings, the well-being of early childhood educators that impacts children’s emotional competence, and the importance of engaging families in promoting children’s emotional well-being and positive behavior. This chapter uses a systemic lens and emphasizes the importance of collaborative partnerships between parents and early childhood educators in supporting young children’s emotional well-being and positive behavior.