1Shachar M &Neumann Y. Difference Between Traditional and Distance Education Academic Permances: A meta-analyric approach[J]. International review of Research in Open and Distance Learning, ( October - 2003 ). ISSN- 1492 -2003.
2Open and Distance Learning: Trends, Policies, and Strategies Considerations [ C ]. UNESCO,2002.
3Gu, Yueguo. From Classroom to distance to Internet[C]. In Hu, wenzhou, ed, Proceedings of the 3rd International Conference on ELT in China. Foreign Language Teaching and Research Press ,2002.
4Hedge, T. Teaching And I.eaming In The Language Classroom [ M ]. Oxford : Oxford University Press, 2001.13.
5Ngeow, Karen Yeok-Hwa. Enhancing student thinking through coUaborative learning [ J ]. ERIC Digest. Retrieved June 19, 2003 from http ://www. ericfacility. net/ericdigest/ed422586. html, 1998.
