The Pedagogy of Science Teaching Test (POSTT) was created to assess pedagogical content knowledge of inquiry science teaching and knowledge of topic teaching practices that reflect the inquiry nature of science. This assessment, developed for formative and summative use, includes over 100 items across 3 science disciplines (physical, life, and earth sciences) for various topics, grade ranges, and facets of instruction. For formative use in teacher education, individual items can be used to engender debate and discussion about science teaching approaches, in the context of specific topics