This is just a partial bibliography of references I have used in my research to date.
[Bier91] Eric A. Bier and Steve Freeman. MMM: A User Interface Architecture for Shared Editors on a Single Screen. UIST '91, pages 79-86, 1991.
[Bricker95] Lauren J. Bricker, Steven L. Tanimoto, Alex I. Rothenberg, Danny C. Hutama, and Tina H. Wong. Multiplayer Activities that Develop Mathematical Coordination. Submitted to CSCL '95.
[Campione92] Joseph C. Campione, Ann L. Brown and Michael Jay. Computers in a Community of Learners. In E. de-Corte and M. C. Linn and H. Mandl and L. Verschaffel, editors, Computer-Based Learning Environments and Problem Solving, pages 163-188. Springer--Verlag, 1992.
[Clements92] Douglas H. Clements and Bonnie K. Nastasi. The Role of Social Interation in the Development of Higher-Order Thinking in Logo Environments. In E. de-Corte and M. C. Linn and H. Mandl and L. Verschaffel, editors, Computer-Based Learning Environments and Problem Solving, pages 229-247. Springer--Verlag, 1992.
[Dockterman91] David A. Dockterman. Cooperative Learning and Computers. SIGQUE Outlook, 21(2):39-43, 1991.
[Gaver92] William W. Gaver, Thomas Moran, Allan MacLean, Lennart Lovstrand, Paul Dourish, Kathleen Carter and William Buxton. Realizing a Video Environment: EuroPARC's RAVE System. IN CHI '92 Conference Proceedings, pages 27-35, 1992.
[Gisi94] Mark A. Gisi and Cristiano Sacchi. Co-CAD: A Collaborative Mechanical CAD System. PRESENCE, 3(4):341-350, 1994.
[Hiltz88] Starr Roxanne Hiltz. Collaborative Learning in a Virtual Classroom: Hightlights of Findings. In Proceedings of the CSCW, pages 282-290, 1988.,
[Hooper92] Simon Hooper. Effects of Peer Interaction During Computer-Based Mathematics Instruction. Journal of Educational Research 85(3):180-189, 1992.
[Hymes92] Charles McLaughlin Hymes and Gary M. Olson. Unblocking Brainstorming Through the Use of a Simple Group Editor. In Proceedings of the CSCW, pages 99--106, 1992.
[Ishii92] Hiroshi Ishii, Minoru Kobayashi and Jonathan Grudin. Integration of Inter-Personal Space and Shared Workspace: ClearBoard Design and Experiments. In Proceedings of the CSCW, pages 33-42, 1992.
[Jehng94] Jihn-Chang J. Jehng, Yu-Fen Shih, Steven Liang and Tak-Wai Chan. TurtleGraph: A Computer Supported Cooperative Learning Environment. In Proceedings of ED-MEDIA '94, pages 293-298, 1994.
[JiPing90] Zhang Ji-Ping and De Diana. Collaborative Computer-Based Learning in China. In Computer Assisted Learning, 3rd Internactional Conference, ICCAL '90 Proceedings, pages 442-452, 1990.,
[Keys90] Mary Elart-Keys,David Halonen, Marjorie Horton, Robert Kass and Paul Scott. User Interface Requirements for Face to Face Groupware. In CHI '90 Proceedings, pages 295-301, 1990.
[Koschmann92] T. D. Koschmann and P. J. Feltovic and A. C. Myers and H. S. Barrows. Implications of CSCL for Problem-Based Learning. SIGCUE Outlook 3(21): 32-35, 1992.
[Lee93] Miwha Lee. Gender, Group Composition and Peer Interaction in Computer-Based Cooperative Learning. Journal of Educational Computing Research 9(4):549--577, 1993.
[Monteferrante92] Sandra Monteferrante. Implementation of Calculus, Concepts and Computers at Dowling College. Collegiate Microcomputer, 11(2):95-98, 1993.
[Muhlhauser92] Max Muhlhauser and Joachim Schaper. Project NESTOR: New Approaches to Cooperative Multimedia Authoring/Learning. In Computer Assisted Learning. 4th International Conference, ICCAL '92 Proceedings, pages 453-465, 1992.,
[Muhlhauser94] Max Muhlhauser and Tom Rudebusch. Cooperation Support in Computer-Aided Authoring and Learning. In Proceedings of ED-MEDIA '94, pages 397-402, 1994.
[Olson92] Judith S. Olson, Gary M. Olson and Marrianne Storrosten and Mark Carter. How a Group-Editor Changes the Character of a Design Meeting As Well as it's Outcome. In Proceedings of the CSCW, pages 91-98, 1992.
[Oneill94] D. Kevin O'Neill and Louis M. Gomez. The Collaboratory Notebook: a Networked Knowledge-Building Environment for Project Learning. Proceedings of ED-MEDIA '94, pages 416-423, 1994.
[Palmer94] James D. Palmer and N. Ann Fields. Guest Editor's Introduction: Computer Supported Cooperative Work. IEEE Computer, 27(5):15-17, 1994.
[Pozzi94] S. Pozzi, D. Peterc, P. Concoliino, E. Di Nitto and A. Molinaro. ImageAnnotator: An Image-Based Cooperative Application. In Proceedings of IMAGE'COM 93, the 2nd International Conference Dedicated to Image Communication, held at Bordeaux, France, March 23-25, pages 192-197. 1993.
[Scardamalia92] Marlene Scardamalia and Carl Bereiter. An Architecture for Collaborative Knowledge Building. In E. de-Corte and M. C. Linn and H. Mandl and L. Verschaffel, editors, Computer-Based Learning Environments and Problem Solving, pages 41-46. Springer--Verlag, 1992.
[Smith92] Randall B. Smith. What You See is What I think you See. SIGCUE Outlook 3(21):18-23, 1992.
[Stefik87] Mark Stefik, Gregg Foster, Daniel G. Bobrow, Kenneth Kahn, Stan Lanning and Lucy Suchman. Beyond the Chalkboard: Computer Support for Collaboration and Problem Solving in Meetings. Communications of the ACM, 30(1):32-47, 1987.
[Takemura92] Haruo Takemura and Fumio Kishino. Cooperative Work Environment Using Virtual Workspace. In Proceedings of the CSCW, pages 226-232, 1992.
[Vockell89] Edward L. Vockell. Group Size for Computerized Instruction. Educational Technology 29(9):30-32, 1989.
[Wolf92] Catherine G. Wolf and James R. Rhyne. Communication and Information Retrieval with a Pen-Based Meeting Support Tool. In Proceedings of the CSCW, pages 322-328, 1992.
[NCTM] National Council of Teachers of Mathematics. Curriculum and Evaluation Standards for School Mathematics. National Council of Teachers of Mathematics, Reston, Virginia, 1989.