Hypertext can be characterized as an electronic system that works by association rather than indexing, and furnishes information in a dynamic, nonsequential manner that does not limit the content by structure or organization. A more technical definition specifies that hypertext is a technique for organizing information in a complex manner that…

Tests the effectiveness of CONTACT-2, a revision of CONTACT strategy, which uses continuous, computer-assisted activation of learner conceptions in text processing. CONTACT-2 was found to be more effective as a process-oriented instructional strategy. Student subjects in grades five and six with the CONTACT-2 condition constructed better…

Describes a modelling language for representing teaching strategies, based in the context of the COCA intelligent tutoring system. Examines work on meta-reasoning in knowledge-based systems and describes COCA's architecture, giving details of the language used for representing teaching knowledge. Discusses implications for future work. (AEF)