To explore current trends in the utilization of educational technology to improve the teaching and learning of science at all levels, a series of state-of-the-art papers was prepared, then reviewed by the authors and nine other specialists at a meeting convened jointly by UNESCO and the Committee on Science Teaching of ICSU (International Council of Scientific Unions). The revised papers and two additional contributions cover computer-based science education, programed learning in science education, the use of television and radio in science education, theory and selection of learning media, integrated multimedia systems both with and without television and radio, educational technology in the professional training of teachers, and educational technology applied to the learning of science in developing countries. An introduction provides a laymans's impression of the meeting. Names of participants are appended. (SK)