1. Online learning environments, scientific argumentation, and 21st century skills / Douglas Clark, Victor Sampson, Karsten Stegmann, Miika Marttunen, Ingo Kollar, Jeroen Janssen, Armin Weinberger -- 2. Negotiations of meaning with MOODLE / Marco Bettoni -- 3. E-collaborative knowledge construction in chat environments / Michael Oehl, Hans-Rüdiger Pfister -- 4. Collaborative knowledge construction / Michael Tscholl, John Dowell -- 5. Contributions of e-collaborative knowledge construction to professional learning and expertise / Christian Harteis -- 6. E-collaborative help-seeking using social web features / Silke Schworm, Markus Heckner -- 7. Computer-supported collaborative scientific conceptual change / Lei Liu, Cindy Hmelo-Silver -- 8. Flexible peer assessment formats to acknowledge individual contributions during (web-based) collaborative learning / Dominique Sluijsmans, Jan-Willem Strijbos -- 9. How to design support for collaborative e-learning / Dejana Diziol, Nikol Rummel -- 10. Scripting computer-supported collaborative learning / Päivi Häkkinen, Maarit Arvaja, Raija Hämäläinen, Johanna Pöysä -- 11. Supporting collaboration and communication in videoconferences / Manuela Paechter, Mareike Kreisler, Brigitte Maier -- 12. Supporting virtual learning through e-tutoring / Birgitta Kopp, Melanie Germ, Heinz Mandl --

13. Three stages in the social construction of virtual learning environments / Ken Stevens -- 14. Transactive memory and technology in work groups and organizations / Richard Moreland, Kristina Swanenburg, Jeffrey Flagg, Joshua Fetterman.