The general purpose of this program evaluation was to provide formative information to the Education Quality and Accountability Office (EQAO) (and through the office to the Ministry of Education and Training) for improving the Ontario Academic Course Teacher In-Service Program (OAC-TIP). The evaluation was designed and conducted in collaboration with EQAO's Assessment Advisory Committee, representing the key partner organizations, and a steering committee of individuals experienced with the program. Data for the study were collected by means of questionnaires, focus-group consultations, and a review of Ministry of Education and Training documents and records. The study generated 25 recommendations for consideration in the development/redesign of an OAC-TIP-like program.