An attempt was made to examine three of the existing science curriculum materials for elementary schools and establish the necessary competencies of teachers who can teach them, using the 1970 guidelines proposed by the American Association for the Advancement of Science for pre-service preparation in science for elementary school teachers. The five guidelines were selected as parameters for education: Scientific Inquiry, Attitudes Toward Science, Processes of Science, Scientific Knowledge, and Continuous Learning. Three curriculum projects (Science Curriculum Improvement Study, Elementary Science Study, and Science - A Process Approach) were analyzed for competencies needed. The competencies were arranged in learning hierarchies. Ten instructional modules were prepared to achieve the competencies. The modules were evaluated by pre- and in-service teachers. (Author/PS)