A sequel to the earlier book CSCL: THEORY AND PRACTICE OF AN EMERGING PARADIGM (Koschmann, ed.), selections in this volume not only highlight how the Computer Supported Collaborative Learning (CSCL) field has advanced since publication of the volume, "...an excellent example of a good means-end methodology....This approach gives a good overview of what educators, educational technologists and educational researchers are doing and is well in keeping with the ideas behind collaboration and knowledge construction."—British Journal of Educational Technology"The contribution of this book is manifold. 'CSCL 2' provides a crucial link between theory and practice, between innovation and theorizing, between work in CSCL and work in related disciplines. The book essentially delivers what the title promises in that it carries the conversation forward by providing a state of the art account and by advancing our understanding of CSCL."—Mind, Culture and Activity