This paper surveys the results from seven recent, prominent RCT evaluations of SGs in seven countries. It consolidates the findings in a single document that reflects upon the commonalities and differences across the results and places them within the broader body of evidence about the role of SGs in the lives of their members. The paper presents ways in which the SG community is using the body of evaluation research to inform and improve its programs. Information about the implementation and results of the RCTs has been collected through publicly available results, results not yet publicly available, and a series of interviews with researchers and programming specialists in the field. The goal of this synthesis paper is to consolidate knowledge about general outcomes of SG participation; the paper should not be interpreted as a comparison of programs across facilitating agencies.