The 1982 Search for Excellence in Science Education project has identified 50 exemplary programs in physics, chemistry, biology, and earth science. Descriptions of four of these programs and the criteria used in their selection are presented. The first section reviews the direction established by Project Synthesis in searching for exemplary programs, discussing the desired and actual states in such programs as related to four goal clusters (personal needs, societal issues, fundamental knowledge, and careers), curriculum, instruction, evaluation, and teachers. The criteria used by professional organizations in selecting one exemplary program in their respective discipline are also provided. Organizations include the American Association of Physics Teachers, American Chemical Society, National Association of Biology Teachers, and National Association of Geology Teachers. The second section provides a description of each of these four programs, including school setting, program history, and program maintenance. The third section analyzes the four programs in terms of each other, and lists the generalizations arising from a study of the 50 National Science Teachers Association exemplary programs. Among the features of these programs are the utilization of laboratories, field experiences and community related projects/activities and the concern with the affective domain and all-round growth of students. (JN)