There is no doubt that learning in groups is in general more fun, often more stimulating, and sometimes more
successful than learning individually. This simple insight is reflected in the computer supported collaborative
work (CSCW) tools omnipresent in class-management systems (e.g., WEBCT, cf. www.webct.com) and
web-based learning (WBL) platforms (e.g. MILCA, milca.sfs.uni-tuebingen.de). It is also corroborated by the
results of the new problem-based learning (PBL) paradigm which is essentially a collaborative work learning
strategy used together with a new concept of teaching (Rhem 1998).