J. Abbas, C. Norris, and E. Soloway, Scaffolding features to support inquiry based learning: Study of the ARTEMIS digital libary interface, 2001.

C. W. Anderson, J. D. Holland, and A. Palincsar, Canonical and Sociocultural Approaches to Research and Reform in Science Education: The Story of Juan and His Group, The Elementary School Journal, vol.97, issue.4, pp.359-383, 1997.
DOI : 10.1086/461871

H. C. Arnseth, S. Ludvigsen, F. Guribye, and B. Wasson, From Categories of Knowledge Building to Trajectories of Participation. Analyzing the Social and Rhetorical Organization of Collaborative Knowledge Construction, 2002.

C. Bereiter, Education and Mind in the Knowledge Age, 2002.

G. C. Bowker and S. L. Star, Sorting Things Out, 1999.

A. L. Brown, Design Experiments: Theoretical and Methodological Challenges in Creating Complex Interventions in Classroom Settings, The Jasper Project. Lessons in Curriculum, Instruction, Assessment, and Professional Development, pp.141-178, 1992.
DOI : 10.1016/0010-0285(88)90014-X

M. Donald, Orgins of the Modern Mind. Three Stages in the Evolution of Culture and Cognition, 1991.

H. Garfinkel, Studies in ethnomethodology, 1967.

J. B. Greeno and S. V. Goldman, Thinking Practices in Mathematics and Science Learning, 1998.

K. Hakkarainen, L. Lipponen, and S. Järvelä, Epistemology of Inquiry and Computer-Supported Collaborative Learning, CSCL 2: Carrying Forward the Conversation, pp.129-156, 2002.

K. Hakkarainen and T. Palonen, Patterns of Knowledge Building in Computer-Supported Inquiry

B. Jordan and A. Henderson, Interaction Analysis: Foundations and Practice, Journal of the Learning Sciences, vol.3, issue.409, pp.39-103, 1995.
DOI : 10.1016/0020-7373(91)90039-A

S. R. Ludvigsen and A. Mørch, Categories at work: Collaboration in co-loacted and distributed setting. Paper ISCRAT, 2002.

S. Ludvigsen, I. Rasmussen, and I. Solheim, Learning in multimedia environments. Talk between students and teachers ICT and the culture of learning in schools, p.Prisma forlag, 2002.

Å. Mäkitalo, Categorizing Work: Knowing, Arguing, and Social Dilemmas in Vocation Guidence, Göteborg Studies in Edcational Sciences, 2002.

Å. Mäkitalo and R. Säljö, Talk in institional context and institutional context in talk: categories as situated practices, TEXT, vol.22, issue.1, pp.57-82, 2002.

H. Muukkonen, K. Hakkarainen, and M. Lakkala, Collaborative technology for facilitating progressive inquiry, Proceedings of the 1999 conference on Computer support for collaborative learning, CSCL '99, 1999.
DOI : 10.3115/1150240.1150291

K. R. Popper, Epistemology Without a Knowing Subject, Proceedings of the Third International Congress for Logic, pp.333-373, 1968.
DOI : 10.1016/S0049-237X(08)71204-7

K. R. Popper, Objective Knowledge: An Evolutionary Approach, 1979.

I. Rasmussen, I. Krange, and S. Ludvigsen, Openness and structure in technology rich learning environments -how is agency and knowledge construction distributed between tools, students and teachers? Paper ISCRAT Lectures on conversation, 1992.

M. Scardamalia and C. Bereiter, Computer Support for Knowledge-Building Communities, Journal of the Learning Sciences, vol.1, issue.3, pp.265-283, 1994.
DOI : 10.1207/s15327809jls0303_3

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.600.463

G. Stahl, Contributions to a Theoretical Framework for CSCL Computer Support for Collaborative Learning: Foundations for a CSCL Community, Proceedings of: CSCL 2002, 2002.

K. Stenning, J. G. Greeno, R. Hall, M. Sommerfeld, and M. Wiebe, In press) Coordinating Mathematical with Biological Multiplication: Conceptual Learning as the Development of Heterogeneous Reasoning Systems The role of communication in learning to model, Do Categories Have Politics? Computer Supported Cooperative Work (CSCW), pp.177-190, 1994.

D. Suthers and C. D. Hundhausen, The Effects of Representations on Students' Elaborations in Collaborative Inquiry Computer Support for Collaborative Learning: Foundations for a CSCL Community, Proceedings of: CSCL 2002, 2002.

J. Zhang, The Nature of External Representations in Problem Solving, Cognitive Science, vol.57, issue.3, pp.179-217, 1997.
DOI : 10.1207/s15516709cog2102_3