Many claims are made for problem-based learning (PBL), which has been implemented worldwide across many schools. But what are these claims and what evidence is available so far? Does PBL enhance domain-specific knowledge acquisition? Does PBL enhance the application and transfer of domain-specific knowledge? Does PBL enhance the development of generic lifelong learning competencies? Does PBL enhance deep learning? Under which conditions is PBL effective and for what kinds of students? What are the working ingredients of PBL and why does PBL work or not work? There are many questions to be answered about PBL. You have conducted several reviews that shed light on some of the issues raised here and therefore I wonder what your opinions are on some of the claims made for PBL and on how to advance research in this domain.
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