Hypertext can be a valuable instructional tool, but too often teachers assemble screen-projected hypermedia presentations overencumbered with their own navigational aids. This technique leaves students disoriented and disinterested. A hypertext prototype is proposed that maximizes the teacher's ability to control delivery while keeping students…

Interactive digital video enables computer visualization techniques that help students to collect, analyze, and model two-dimensional motion data. This article describes and evaluates five activities developed for the physics classroom with the use of this technology in mind. Activities explore concepts such as space, time, frames of reference,…

Special types of prosthetic devices have been designed to support the specific needs of disabled and handicapped computer users in retrieving information. Of particular importance are interfaces based on the use of sound, tactile operations, and gestures. Such interfaces may be used to provide disabled people with access to hypermedia information.…