Presented are two of the science modules (from Appendix A), developed for a study at Central Michigan University, focusing on competency-based materials in science methods education for elementary school teachers. The Materials Module is designed to involve the preservice teachers in examining, analyzing and evaluating three elementary science curriculum projects: Elementary Science Study (ESS), Science Curriculum Improvement Study (SCIS), and Science - A Process Approach (SAPA). The Textbook Review and Evaluation Module is designed to cause preservice teachers to review and evaluate different science textbook series. It is based on the rationale that as teachers the college students will some day have to serve on a textbook selection committee. (PEB)