Abstract
Although collaborative learning, often supported by computer networks (widely called computer-supported collaborative learning, or CSCL) is currently being implemented at all levels of education, it has not always proven to be the wonder-tool that educators envisioned and has often not lived up to the high expectations that educators had for it. In this introduction to the special issue on CSCL, a framework for research on CSCL is presented. This framework is presented in the form of a 3 × 3 × 3 cube, with the dimensions Level of Learning (cognitive, social, and motivational), Unit of Learning (individual, group/team, and community) and Pedagogical Measures (interactive, representational, and guiding). Based on this framework, the different contributions are discussed, and the empty cells—which should form the basis for further theoretical research—become evident.