2Aaronson, E. 1978. The Jigsaw Classroom. Beverly Hills, CA: Sage Publications.
3Arnold, J. and D. Brown. 1999. "A map of the terrain. In J. Arnold (ed.) Affect in Language Learning. Cambridge :Cambridge University Press.
4Bejarano, Y. 1999. "An integrated group work model for the second language classroom." In S. Sharan (ed.) Handbook of Cooperative Learning Methods.London: Praeger Publishers.
5Crandall, J. 1999. "Cooperative language learning and affective factors." In J. Arnold (ed). Affect in Language Learning. Cambridge: Cambridge University Press.
6Dornyei, Z. and Angi Malderez. 1999. "The role of group dynamics in foreign language learning and teaching". In J. Arnold (ed.) Affect in Language Learning. Cambridge: Cambridge University Press.
7Krashen,S. D. 1982. Principles and Practice in Second Language Acquisition. Oxford, England: Pergamon.
8Johnson, D. W. ,Johnson, R. T. and Stanne,M. B.2000. "Cooperative learning methods: a metaanalysis". http://www. clcrc. com/.
9Johnson, D. W. and Johnson, R.T. 1994. Learning Together and Alone: Cooperative, Competitive,and Individualistic Learning. Bonston: Allyn and Bacon.
10Nunan, D. 1992. Collaborative Language Learning and Teaching. Cambridge: Cambridge University Press.
