On September 14, 2017, the Roundtable on Population Health Improvement of the National Academies of Sciences, Engineering, and Medicine convened a workshop to explore the intersection of health and early childhood care and education, two key social determinants of health. This workshop follows a 2014 roundtable workshop that considered the interface between the education and health sectors broadly, from research and metrics to cross-sectoral partnerships and financing. The 2017 workshop continued that discussion, with a deeper focus on early childhood (birth through age 5) as a critical period in human development and an important opportunity for educational and related interventions. This publication summarizes the presentations and discussions from the 2017 workshop.