We show the results of a research addressing the effects of organizing the teaching of Physics around a problem-based structure. This approach is based upon outlining and addressing the fundamental problems that originated the basic concepts and theoretical framework of the subject matter. We have measured the significant improvement observed in both the students' conceptual understanding and in their attitude and interest towards Physics. We have also investigated whether these learning gains are maintained after the course is over, or a relatively large time has elapsed.
science teaching based on fundamental problems; conceptual change; attitudinal change
