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Andreas Lingnau, Andreas Harrer, Markus Kuhn and H. Ulrich Hoppe - An Activity System Analysis of a Tripartite Technology-Supported Partnership for School Reform
Daniel D. Suthers, Joyce Yukawa and Violet H. Harada - The Role of Expert and Novice Tutors in Computer Mediated and Face-To-Face Problem-Based Learning
Joerg Zumbach and Peter Spraul