We engaged three teams—Mathematica Policy Research, Concept Hatchery, and FURTHER By Design—each with their unique expertise and varying styles of inquiry, to learn more about informal care settings as well as potential strategies to provide informal caregivers with the skills and support they need to create healthy, engaging environments for children to grow and succeed. This report is a compilation of the findings from the three research projects. The following sections are brief synopses of their methods, key insights, recommendations, and links to their full reports. (author abstract)