Increased emphasis on science and mathematics education research in Costa Rica since 1973 is reported. The majority of the studies carried out in the past 12 years have been diagnostic studies. General findings are listed, under the headings of certification, supervision, basic skills, teaching methods, attitudes, and curriculum. The diagnostic stage is now considered over, and there is interest in putting into practice and evaluating teaching innovations, and improving in-service teacher preparation. The need for financial support is noted. International Consortium for Concept Learning activities are discussed, with the current project on calculators briefly described. (MNS)