This paper reports on an integration of concept mapping for manipulating and structuring knowledge with multimedia presentation technology. The intelligent hypermedia system HAN (hypermedia activated network) is an authoring environment that generates small hypermedia tutorials online as they are required. A student query activates a portion of a semantic network representing the key concepts of a domain of a HAN module. The activated portion of the network and a simple model of the student are used by the system to construct a small mapped hypertext which can then be explored by the student. The HAN system combines hypermedia material for the authoring and tutorial interface provided by Apple's HyperCard with a core semantic network management system implemented in Logic Programming Associates' MacProlog. These systems communicate via Apple's Apple Event interface. Following an evaluation of the use of this system to teach second-year students of architecture at University of Sheffield (England), the authoring and inference aspects of the system were substantially improved. The system is now being extended to demonstrate the support of some aspects of cognitive science and psychology. The HAN system integrates artificial intelligence and flexible learning techniques in a dual-platform experiment with hypertext and semantic network architectures. (AEF)