The foundation and impetus for a sustained professional development program offering 44 graduate courses serving 641 FCS educators (approximately 50% returning participants) in Pennsylvania and the surrounding area were the six assumptions of Knowles related to the motivation of adult learners. Education researcher Malcolm Knowles asserts that andragogy (adult-leading learning) should replace the more commonly used pedagogy (child-leading learning) when providing professional development for adult learners. His theory includes the process of engaging adult learners with the structure of their learning experiences (Knowles, Holton, & Swanson, 1998). The purpose of this article is to explore this summer professional development series linking Knowles principles of adult learners with relevant FCS topics and learning experiences as they contribute to the program's sustainability. (Contains 2 tables and lists 1 resource.)