1Femke Kirschner&Fred Paas&Paul A.Kirschner,A CognitiveLoad Approach to Collaborative Learning:United Brains for ComplexTasks,(J)Educ Psychol Rev,2009,21:31 42.
2Maddix,Mark A.Online Learning Communities:TheHeart of On-line Learning.(J)Common Ground Journal(Spring).2010.
3Charlie Y.Shim,Mina Choi,and Jung Y.Kim,Promoting Collabo-rative Learning in Software Engineering by Adapting the PBL Strate-gy(J).Proceedings of World Academy of Sci ence,engineering andTechnology,2009,4()5.
4KaterinaMavrou,Ann Lewis and GraemeDouglas Researching com-puter-based collaborative learning in inclusive classrooms in Cyprus:The role of the computer in pupils’interaction(J).British Journal ofEducational Technology,2009.
5Li,Y.,Dong,M.,&Huang,R.Toward a Semantic Forum forActive Collaborative Learning.Educational Technology&Society,2009,12,(4):71-86.