3Shreeve MW. Beyond the Didactic Classroom:Educational Models to Encourage Active Student Involvement in Learning[J]. J Chiropr Educ,2008;22(1) :23-28.
4Barrows H. S. & Tamblyn R. M. Problem-Based Learning: An Approach to Medical Education[M]. New York zSpringer Publishing Company,1980. p. 1.
5Schmidt HG. Problem-based learning: rationale and deseription.[J]. Med Educ, 1983,17(1) : 11-16.
