7Alavi, M. Computer-mediated collaborative learning:An empirical evaluation[J]. MIS Quarterly,1994,18(2):159-174.
8Brush, T.A. The effects on student achievement and attitudes when using integrated learning systems with cooperative pairs[J]. Educational Technology Research and Development, 1997,45 (1): 51-64.
9Johnson, D. W. , & Johnson, R.T. Positive interdependence: Key to effective cooperation[A]. In R.Hertz-Lazaowitz & N. Miller (Eds.). Interaction in Cooperative Groups[M]. 1992:174-199.
10Johnson, D. W. , & Johnson, R.T. Learning Together and Alone: Cooperative, Competitive, and Individualistic Learning [M]. (4th ed. ). Needham Heights,1994.
