5Dillenbourg P. What do you mean by collaborative learning? In P. Dil- lenbourge (ED) Collaborative - learning: Cognitive and Computational Approaches. Oxford, 1999.1 - 19.
6Hicks, D. Contextual inquiries : A discourse - oriented study of class- room learning. In D. Hicks ( Ed. ) , Discourse, learning and schooling New York, NY : Cambridge University Press, 1996. 104 - 141.
7J.B. Arbaugh. "How Classroom Envrionment and Student Engagement Affect Learning in Internet? - based MBA Courses" Business Commu- nication Quarterly,2000,12:63.
8Karen Ragoonaden. Collaborative Learning via the Internet. Educational Technology & Society ,2000,3 (3).
