Discussion of the educational effectiveness of textbooks focuses on a model of a virtual textbook that relies on hypermedia. Highlights include changing roles of teachers, students, and content; systemwide features of the virtual textbook, including interface and object-oriented design; classroom environment; sequencing; and a prototype. (Contains…

Examines issues related to the way a teacher acting as instructional designer deals with the content or knowledge base of the instructional materials being developed, including the nature of knowledge, learners' schemata, organization of content, facilitating abstract thinking, and standards of accuracy for knowledge representation. (24…