Design::Effect is a web-based learning tool that helps design entrepreneurs measure their social impact. The project is a direct response to the abundance of good ideas on how to apply design to social change, but the relative lack of information on the real impact they are having. Design::Effect serves as a first stop to learning about the value of measuring social return on investment and how to do it. Targeted to the design community, the tool leverages designers’ expertise in communicating visually by integrating data visualization.