摘要:The Gilbert M. Grosvenor Center for Geographic Education has been experimenting with online professional development in geography. The first effort has been the production of four video programs in a series called, “Geography: Teaching with the Stars.” The programs are 1) “Globalization,” “Watershed Management,” “Agriculture and Water,” and “Tidewaters.” Using these programs in a workshop environment, the authors became aware that teachers found the online method of professional development at least equally attractive to the traditional face-to-face method. Many teachers found positive elements in both techniques and supported a hybrid approach, which led to the development of the Learning Cluster Method, a hybrid (online and face-to-face) configuration that relies mainly on the power of teacher leadership traits, while at the same time significantly increasing opportunities for dissemination of quality professional development in geography. The authors believe that this approach holds substantial promise for international collaboration in teacher professional development.