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)

Discussion of evaluation of computer-based learning (CBL) looks at six different approaches: use of quantitative data for assessment; student and staff attitudes and perceptions of computer use for learning; formative evaluation for CBL design; effectiveness of CBL in comparison to conventional instruction; evidence of whether CBL enables students…