The purpose of this study was to introduce an AR approach to a group of science teachers during an in-service AR course program and learn its contributions to their professional development. Data were gathered through an AR project by working with a group of eight science teachers throughout a four-week period. In the content of the course, knowledge on educational research was given to teachers and then the participants were encouraged to conduct small-scale AR projects. During this process, it was found that project teachers willingly participated in all the meetings, embracing the views of doing research based on their own classroom environments, making these research results public, gaining reputation, and increasing the quality of their own practices. (Contains 1 footnote.)