Content=knowledge+media: content acquisition, maintenance, communication, and construction for intelligent tutoring systems

Developers of intelligent tutoring systems (ITSs) and other types of knowledge-based learner support and performance support systems have traditionally faced a variety of problems acquiring, maintaining, communicating, and helping learners to construct knowledge. The authors review some of these traditional problems in the development of ITSs, and then reconsider them from the broader perspective of content. They explore the notion of content (i.e., knowledge+media) and its implications for developers of ITSs. A few of the problems that arise in content-rich systems which combine knowledge and media are presented