The Educational Technology Center (ETC) was established by the National Institute of Education in October, 1983, in order to find ways of using the computer and other information technologies to teach science, mathematics, and computing more effectively. This report describes the ETC, presents its framework for research, and summarizes work on 11 research projects. These projects dealt with the following topics: (1) weight and density; (2) heat and temperature; (3) scientific theory and methods; (4) hypothesis testing in genetics; (5) geometry; (6) word problems; (7) fractions; (8) programming; (9) applications of computers; (10) videodisc technology; and (11) science teachers' networks. (TW)