The data presented in this brief are drawn from surveys of 220 EHS-CC Partnership grantee directors and 386 child care center directors and family child care providers. The data provide national estimates of the activities they engaged in through their partnerships. Additionally, this brief highlights findings from in-depth case studies of 10 EHS-CC Partnerships to illustrate some of the quality improvement opportunities and challenges they encountered. As described below, the EHS and child care partners worked together on a range of activities to set high standards for quality, assess their quality improvement needs, and support high quality caregiving and learning environments for infant and toddlers. Specifically, this brief addresses the following questions: - How do EHS-CC Partnerships ensure all settings serving infant and toddlers are meeting the Head Start Program Performance Standards (HSPPS)? - How do EHS-CC Partnerships identify quality improvement needs? - How do EHS-CC Partnerships support the skills and credentials of staff caring for infants and toddlers? - How do EHS-CC Partnerships support high quality learning environments for infants and toddlers? (author abstract)