PLUS, an authoring system designed to develop cross-platform courseware for different computer types, was evaluated for its portability (ability to run on multiple platforms without adjustment). The procedures and computer equipment used are described, and results are presented. It is concluded that PLUS produces highly portable programs. (MSE)

A framework for examining the effectiveness of different types of educational computing environments addresses the conceptual characteristics of the knowledge domain being learned and the learner's stage of knowledge. Characteristics of certain technology-based learning environments (computer-based drill, intelligent tutoring systems, hypertext)…