Proposes that a semiotic approach can be used as a supplementary method in assessing the denotations and connotations of the signs and their relationships in computer learning environments. Utilizes the semiotic framework to study visual images, especially how multiple, interactive, and manipulative statistical representations affect the…

Describes videotex development; discusses optimal internal organization, visual display, and presentation of information on videotex screen; addresses policy issues of equity, privacy, and costs that affect instructional use of videotex; outlines videotex field trials and experiments within education; and draws conclusions on significance of…

This discussion of teaching science as a design activity emphasizes open-ended problem solving. Highlights include the relationship between teachers and students; hypotheses as solutions; and descriptions of four microworlds, or computer simulations, in chemistry, geography, physiology, and genetics which use graphic interfaces. (LRW)

Describes an advice-giving computer system being developed for genetics education called MENDEL that is based on research in learning, genetics problem solving, and expert systems. The value of MENDEL as a design tool and the tutorial function are stressed. Hypothesis testing, graphics, and experiential learning are also discussed. (Author/LRW)