Contents: G.M. Olson, J.S Olson, R. Kraut, Series Editors' Comments. Preface. Part I:Case Studies of Technology Transfer. N. Miyake, T. Koschmann, Realizations of CSCL Conversations: Technology Transfer and the CSILE Project. J. Hewitt, From a Focus on Tasks to a Focus on Understanding: The Cultural Transformation of a Toronto Classroom. J. Oshima, R. Oshima, Coordination of Asynchronous and Synchronous Communication: Differences in Qualities of Knowledge Advancement Discourse Between Experts and Novices. F.P.C.M. de Jong, E. Veldhuis-Diermanse, G. Lutgens, Computer-Supported Collaborative Learning in University and Vocational Education. K. Hakkarainen, L. Lipponen, S. Jarvela, Epistemology of Inquiry and Computer-Supported Collaborative Learning. Part II:Empirical Studies of Learning in Collaborative Settings. R. Hall, Collaboration and Learning as Contingent Responses to Designed Environments. D.W. Shaffer, Design, Collaboration, and Computation: The Design Studio as a Model for Computer-Supported Collaboration in Mathematics. R.R. Stevens, Divisions of Labor in School and in the Workplace: Comparing Computer- and Paper-Supported Activities Across Settings. H. Suzuki, H. Kato, Identity Formation/Transformation as a Process of Collaborative Learning of Programming Using AlgoArena. V. Kaptelinin, M. Cole, Individual and Collective Activities in Educational Computer Game Playing. Part III:Technologies for Collaboration and Learning. T. Koschmann, Becoming More Articulate About the Theories That Motivate Our Work. V. Colella, Participatory Simulations: Building Collaborative Understanding Through Immersive Dynamic Modeling. H. Kato, K. Yamazaki, H. Suzuki, H. Kuzuoka, H. Miki, A. Yamazaki, Designing a Video-Mediated Collaboration System Based on a Body Metaphor. P. Bell, Using Argument Map Representations to Make Thinking Visible for Individuals and Groups. G. Gay, R. Rieger, T. Bennington, Using Mobile Computing to Enhance Field Study.