Providing support focused on real challenges is critical in retaining highly qualified new science teachers, but the field lacks a systematic description of these teachers’ needs. The authors of this article examine the areas that science teachers are expected to understand: (1) the content and disciplines of science, (2) learners, (3) instruction, (4) learning environments, and (5) professionalism. They review the literature on challenges facing preservice and early-career science teachers, identify issues on which conventional wisdom is supported or called into question, and highlight the areas where the existing research is inadequate as a basis for generalization. For example, the authors found few studies on how new science teachers use curriculum materials or how they understand scientific inquiry. Their overview of challenges is followed by a discussion of how these teachers can be supported.

This paper explores new elementary teachers' instructional representations and how these are related to their science subject matter knowledge. One pair of prospective elementary teachers studied here exhibited a well-integrated, principled, and scientifically accurate understanding of the science they were teaching. The other pair exhibited less scientifically accurate and integrated knowledge. The pair with stronger subject matter knowledge developed instructional representations that were more scientifically and pedagogically appropriate. A perspective on one aspect of pedagogical content knowledge-knowledge of instructional representations-is presented. Real-world applications are hypothesized to play a crucial mediating role for elementary teachers. The paper concludes with a discussion of implications for elementary science teacher educators and researchers, including the importance of attending to how prospective teachers apply science knowledge to real-world situations.