5Johnson, D.W., Johnson,R.T.,& Smith,K. (1991). Cooperative Leaming, p. 16.
6Stevens, R.J.,Slavin, R.E.,& Farnih,A.M.(1991).The Effects of Cooperative learning and Direct.Instruction in Reading Comprehension Strategies on Main Idea Identification Journal of Educational Psychology,Vol.83,No.1,pp.8-16.
8Geroge M Jacobs, Michael A Power, Loh Wan Lun. The Teacher's Sourcebook for Cooperative Learning : Practical Techniques, Basic Principles, and Frequently Asked Questions [M]. Corwin Press, 2001.
9D W Johnson, R T Johnson. Learning Together and Alone: Cooperative, Competitive, and Individualistic Learning (5^th, ed) [M]. Ally and Bacon, 1999.