In this brief, our primary goal is to place a spotlight on mental health, behavioral health, and social and emotional well-being in Head Start and Early Head Start (HS/EHS), drawing on data from the Head Start Health Manager Descriptive Study (HSHMDS) (see text box) to identify the nature of the health issues programs face, the approach to staffing and the types of supports and services provided, and the community partners that programs work with to address this important aspect of early childhood health. In particular, we focus on the following questions: - What mental health, behavioral health, and social and emotional well-being issues do HS/EHS programs face? - What staffing models are used to address this domain of health? How does staff training address mental health, behavioral health, and social and emotional well-being? - What health programming (e.g., services, activities, education) is in place to address mental health, behavioral health, and social and emotional well-being issues? - How are programs leveraging the Health Services Advisory Committee (HSAC), health care providers, and other community resources to address mental health, behavioral health, and social and emotional well-being? While we rely primarily on findings from the Health Manager Survey, we also integrate some of the qualitative findings based on the interviews with health managers and other program staff. (author abstract)