This report summarizes the educational technology research conducted from 1990 through 1994. It is based on 133 research reviews and reports on original research projects from both published and unpublished sources. This research varied in methodology: some studies used a technique for synthesizing and analyzing data from many different studies; some compared the use of technology to traditional instructional methods; some compared the use of technology under different learning conditions; and some utilized classroom observation. The report is divided into three sections: (1) "Effects of Technology on Student Achievement"; (2) "Effects of Technology on Student Self-Concept and Attitudes about Learning"; and (3) "Effects of Technology on Interactions Involving Teachers and Students in the Learning Environment." A list of conclusions drawn from the analysis is included, as well as a bibliography of the research cited. (Contains 170 references.) (JLB)