In this paper, I describe the implementation of a project-based economics unit in a fifth-grade classroom in Michigan, titled One Hen. One Hen is a curricular unit designed to teach students about social entrepreneurship as a way for students to learn economic concepts while developing their own civic efficacy by engaging in a project where they design and run their own social business. These findings are part of a larger case study that examines one fifth-grade class's experience with One Hen and what these students learned about the economic concepts of loans and entrepreneurship. Through the authentic experiences of project-based learning, the fifth-grade students developed a more sophisticated understanding of loans and the role of microfinance in creating a social business.