An Action Research Study of the Effectiveness of Problem-Based Learning in Promoting the Acquisition and Retention of Knowledge

This action research study compares the efficacies of problem-based learning (PBL), traditional lecture, and a combination of PBL and traditional lecture to promote understanding and retention of the principle content of an elective science course, biochemistry, taught at a school for talented students. The study utilizes a pre- and post-course self-evaluation of student understanding, a measure of depth of understanding, and a questionnaire designed to determine student satisfaction. Lecture tended to widen the content coverage, while understanding and retention was promoted by PBL. Curriculum must be designed to provide a balance between content coverage and depth of understanding. Due to previous training and perceived needs, students sometimes demand more content coverage than is necessary for a complete and adequate education.