The nature of science (NOS) is a primary goal in school science. Most teachers are not well-prepared for teaching NOS, but a sophisticated and in-depth understanding of NOS is necessary for effective teaching. Some authors emphasize the need for teaching NOS in context. Species, a central concept in biology, is proposed in this article as a…

This longitudinal study aims to provide greater insight into how students' understanding of matter and chemical reactions develops over time and how their knowledge structures are restructured. Four case-study students in a Norwegian primary school were followed for two years from age 10-11 to age 12-13. Researchers were responsible for…

Formative assessment, and especially feedback, is considered essential to student learning. To provide effective feedback, however, teachers must act upon the information that students reveal during instruction. In this study, we apply a framework of formative assessment to explore how sensitive teachers are to students' thoughts and ideas when…