ABSTRACT Professional Development (PD) is an important tool in the field of education. Successful PD programs are those that include adult learning methods and opportunities for experiential learning and discussion. The university where this action research was conducted does not offer formal training to adjunct instructors. The adjunct instructors are hired based primarily on their content knowledge. This research was conducted to understand, if the application of a blended training model for adjuncts influences the adjunct's perception of meeting their student's educational needs and the student's perception that their personal education needs are met. The blended learning included the delivery of a framework that incorporated Andragogy, Content Knowledge and Technology (ACKT). The purpose of the ACKT framework is to supplement adjunct's content knowledge expertise with adult learning methods and technology. The effectiveness of the framework was measured by using a quasi-experimental, pre to post intervention assessment. The treatment group and control group each contained twenty-two adjunct instructors from the university. The treatment group received training on the framework prior to commencing the class and participated in two focus groups during the semester. In addition, the treatment group was observed teaching in their classroom. The control group did not receive training, or participate in focus groups; however they were observed teaching in their classroom. The results of the action research showed significant improvement for the adjunct instructors in the treatment group. Specifically, knowledge of and application of andragogy showed a large improvement. In addition, the social influence of the adjuncts in the treatment group showed a large improvement. Less significant was the improvement in the efficacy of the students in the treatment group classes compared to those in the control group classes. However, the data suggests that the students in the treatment group better applied the content learned and they were more aware of other's educational needs than their peers in the control group. The study supports the need for adjunct instructor PD. Through a PD program adjunct instructors increase their own efficacy and this improvement translates into increased content transfer for the students in the classroom. Based on the strong evidence for adjunct instructor improvement this research will continue by expanding the blended learning model to more of the adjunct instructors at the university, and continuing to evaluate the effectiveness of the model in meeting student's educational needs.