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A Case for Student Communication in online Classes Interactive Learning EnvironmentsVol. 17, No. 1, March 2009, 37–51Read-only participants: a case for student communication in online classesL. Nagela*, A.S. Blignautb and J.C. Cronje ́ caUniversity of Pretoria, South Africa; bNorth-West University, South Africa; cCape Peninsula University of Technology, South Africa(Received 5 April 2007; final version received.