Involving people outside of a science course can foster learning for students enrolled in the course. Assignments involving friends and family provided such opportunities in an undergraduate physics course for prospective teachers. These assignments included reflecting upon prior experiences, interviewing friends and family members, engaging them in exploring physical phenomena, and teaching them with relevant websites. The six strands of science learning articulated in Learning Science in Informal Environments (National Research Council in Learning science in informal environments: People, places, and pursuits. National Academies Press, Washington, DC, 2009) provided a framework for analyzing the prospective teachers' responses. Through such assignments, the instructor created opportunities for the prospective teachers to use and build upon knowledge learned in class as well as to gain confidence and experience in facilitating the learning of others.