Many organizations, private companies, and academic and education institutions currently
devote a substantial part of their capital to employee or student training. Computer-based
training/learning tools offer a cost-effective solution. Advances in information
and communication technologies and, specifically, in Multimedia, Networking
and Software Engineering allow the apparition of a new generation of computer-based
training systems. Intelligent Tutoring Systems (ITSs) form an advanced generation of
Computer-Aided Instruction (CAI) systems. Their key feature is their ability to provide
a user-adapted presentation of the teaching material. ITSs have been developed and
evaluated for many years in the field of artificial intelligence in education. The emergence
of the World Wide Web increased the usefulness of such systems.