With the shifts in science teaching and learning suggested by the Framework for K-12 Science Education, in-service science teachers are being asked to re-envision their classroom practices, often with little support. This paper describes a unique partnership between a school district and a university College of Education, This partnership began as an effort to support in-service science teachers of all levels in the adoption of new science standards and shifts towards 3-dimensional science teaching. Through this partnership, we have implemented regular "Share-A-Thons," or professional development workshops for in-service science teachers. We present here the Share-A-Thons as a model for science teacher professional development as a partnership between schools, teachers, and university faculty. We discuss the logistics of running the Share-A-Thons, including challenges and next steps, provide teacher feedback, and include suggestions for implementation.