This is the third of a three-case series (804-056-1 to 804-058-1). This series of caselets has been designed to encourage students to clearly define social impact, think through methods to measure social impact and to illustrate value creation via the SROI metric (social return on investment). The caselets draw upon the original framework developed by the Roberts Enterprise Development Fund (REDF) and a methodology encouraged through the Global Social Venture Competition (GSVC). The GSVC is a partnership between London Business School, Columbia Business School and Haas. The caselets profile the usefulness of the SROI approach through three very different business models.