This guide for elementary Teacher preparation programs in science education comprises three sections: "Introduction"; "Guidelines"; and "Implementation." The reform efforts, particularly those pertaining to science education, are characterized by a shift towards shared responsibility for the preparation of teachers to include collaborative models that involve teachers of science at many levels. In this document the term "teachers of science" represents many levels of teachers from colleges and universities, public schools, centers for professional development, teacher preparation programs, and informal science institutions. The guidelines in this document refer to certain characteristics of learning environments that strengthen the preparation of elementary teachers, which include collaboratively designed and implemented program support; a hands-on, problem-solving environment in which to learn; instruction that puts the student at the center of the process; focusing on scientific inquiry as the core of all levels of science teaching and learning; and regarding professional growth in science teaching as a continuous and collaborative process. Contains 85 references. (DDR)