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2. The power of problem-based learning in teaching introductory science courses;Allen;New Dir Teach Learn,1996
3. Implementing problem-based learning in a college science class: testing problem-solving methodology as a viable alternative to traditional science-teaching techniques;Arámbula-Greenfield;J Coll Sci Teach,1996
4. Change in student attitudes to medical school after the introduction of problem-based learning in spite of low ratings;Birgegård;Med Educ,1998