The purpose of this literature review, conducted as part of the Study of Early Head Start-Child Care Partnerships, was to assess the current knowledge base for early care and education (ECE) partnerships, highlight promising models or components of models for these partnerships, and identify gaps in the research. We reviewed 78 studies of partnerships in the early childhood education field, including partnerships between Head Start and Early Head Start grantees and child care providers, school districts and child care providers and Head Start agencies, and other types of partnerships, including partnerships with informal caregivers and early intervention services. (author abstract)