A Dutch policy scientist once said the information and knowledge in the
twenty-first century has the shelf life of fresh fish, and learning in
this age often means learning where and how to find something and how to
relate it to a specific situation instead of knowing everything one
needs to know. On top of this, the world has become so highly
interconnected that we have come to realise that every decision that we
make can have repercussions somewhere else. To touch as many bases as
possible, we need to work with knowledgeable others from different
fields (multiple agents) and take heed of their points of view (multiple
representations). To do this, we make increasing use of computers and
computer-mediated communication. If computer-supported collaborative
learning (CSCL) is not simply a newly discovered hype in education, what
is it and why are we writing a book about it? Dissecting the phrase into
its constituent parts, we see that first of all CSCL is about learning,
and in the twenty-first century this usually means constructivist
learning.