"Research Connections" conducted a comprehensive search of its collection for resources focused on early care and education (ECE) collaboration. This Key Topic Resource List includes an overview of the ECE collaboration literature, as well as a listing of selected resources on the topic. Search results are grouped into three broad areas: (1) Defining, Measuring, and Evaluating Collaboration; (2) Collaboration and Early Care and Education Programs; and (3) Evaluations of Collaborations in Early Care and Education. From the many results, "Research Connections" selected a limited number of resources of various types including reports and papers, executive summaries, and reviews. Selection criteria included topic relevance and relatively recent publication (from 1999-2010). Within each category, resources are organized according to publisher type and publication date.