Following the introduction of microcomputers into schools in the late 1970s, National Policy was developed which focused on the use of computers in non-computing subjects. The Victorian strategy for the implementation of the National Computers in Education Program was the development of a week-long in-service course which aimed to develop seeding pairs of teachers who would act as change agents when they returned to school. This chapter looks back at the case studies of two schools which sent teachers to the in-service. The case studies were initially presented in a Master of Educational Studies degree at Monash University. This chapter looks back at the way that professional development was designed to bring about change in schools with respect to computer use, how two schools made use of the seeding pair teachers and what issues emerged as a result.