5Barrows, H. S., Tamblyn, R. Problem-based learning[M]. New York: Springer, 1980: 1.
6Ram, P. Problem-based learning in undergraduate education: A sophomore chemistry laboratory[J]. Journal of Chemical Education, 1999, 76,(8): 1122- 1126.
8Good, T L., Brophy, J. E. Educational Psychology (3rd ed.)[M]. New York: Longman, 1986.
9Barrows, H. S. A taxonomy of problem-based learning methods[J]. Medical Education, 1986,(20): 481 -486.
10Bransford, J. D., Brown, A. L., Cocking, R. R. (Eds.). How people learn : Brain,mind,experience,and school [M]. Washington, DC : National Research Council, 1999.
