3Savery J R. Overview of problem-based learn- ing:definitions and distinctions[J]. The Inter- disciplinary Journal of Problem-based Learn- ing,2006,1(1) :9 -20.
4Colliver J A. Effectiveness of problem-based learning curricula: research and theory[J]. Acad Med,2000,75(3) ..259 - 266.
5Lee R.Monitoring the outcomes of problem-based learning in medical education[J].Journal of Medical Education,2002,6(2):215- 223.
6Barrows H S,Kelson A. Problem-based learning..A Total Approach to Education[M]. Illinois:Southern Illinois University Press, 1993.
