The purpose of this qualitative study was to explore professional development from the perspective of instructional leaders to identify if the assumptions of Knowles’s (1990) Adult Learning Theory were present in the planning and implementation of continuing education. A qualitative case study research design was utilized, and the research setting was dependent on the participants and the locations in which they were contracted to conduct continuing education sessions with teachers. The instructional leaders were committed to plan and present professional development at three different suburban schools surrounding a city in the Southeastern United States. The participants in the study were instructional leaders and educational consultants with at least 10 years of experience who work across school districts with multiple elementary, middle, and high school sites in suburban and urban districts. Data sources included two rounds of interviews, observations of planned and implemented professional development, and document analysis of staff development materials. The data was analyzed using thematic analysis that included within-case and cross-case investigation.