This document outlines the agenda for Day 3 of a workshop on social innovation. The day includes sessions on the three strands of value in social entrepreneurship, social business models, and experimenting with social impact through experimentation and randomized controlled trials. Participants engage in activities to practice applying a business model canvas to social ventures and planning experiments to measure social impact. The document emphasizes testing interventions rigorously through randomized experiments to identify what programs and approaches are truly effective at creating social change.