Teachers adapt their instructional strategies over time based on a variety of contextual constraints. In response to these challenges, teachers often have to make changes to their PBL approaches. While the literature has documented generally positive results of initial PBL implementations, less is known about the degree to which teachers adapt…

Problem-based learning (PBL) is a constructivist method of instruction aligned with the science educational reform movement to increase scientific literacy for all Americans. As such, PBL instruction is an increasingly popular topic for professional development workshops offered to teachers in secondary learning environments. This research…