The three reports in this collection are based on research reviews and original research from both published and unpublished sources, covering the years 1986 through 1990, and they reflect the broad array of factors that determine the effectiveness of technology-based instruction. The first report discusses research studying the effects of microcomputers on student achievement. Such studies compared computer-assisted instruction with more traditional instructional methods, and related student achievement to software design, learner characteristics, and implementation decisions. Research demonstrating the power of microcomputers and other educational technologies to motivate students and to improve their attitudes about learning and themselves is discussed in the second report. Finally, the effects of microcomputers on social interaction and relationships within the classroom are examined. Each study included in these reports is cited in the bibliography. (61 references) (DB)