Phosphates are essential components of any efficient fertilizer. Natural phosphate rock is, however, not available in every part of the world. According to the European Commission, phosphate rock has high economic importance as well as a certain supply risk--at least for Europe. For these reasons, environmental technology research has received a…

In recent decades, several countries have made an effort to increase the enrollment rates and performance of students in science and mathematics by means of mandatory, rigorous course work, which is often referred to as curricular intensification (CI). However, there is a lack of research on intended and unintended effects of CI reforms on…

Our paper analyses the genetics and gene technology contents of German (Bavarian) and Portuguese biology textbooks, as fields common in science-technology-society-environment (STSE) issues. Our aim was to determine the extent to which textbooks from both countries contribute to students' understanding of the STSE issues and therefore to students'…

Teachers' content-related knowledge is a key factor influencing the learning progress of students. Different models of content-related knowledge have been proposed by educational researchers; most of them take into account three categories: content knowledge, pedagogical content knowledge, and curricular knowledge. As there is no consensus about…

Inspired by the Salters Approach (UK) and ChemCom (USA), units for a new curriculum for chemistry teaching are being developed in Germany based on theories of scientific literacy, motivation, and situated learning. The curriculum follows a context-based approach. Rather than using the structure of the discipline, it generates basic chemical…

"What happens to domain knowledge on its way into the school curriculum?" The article explores this question from a systems view of the knowledge transformation process. This process is not only bound to "contextual knowledge" about "social forces" but also to the school's own "educational knowledge"…

"Chemie im Kontext" (ChiK) is a project that aims at the improvement of chemistry teaching at secondary school in Germany. Based on a framework that was derived from theories and empirical data on the teaching and learning of science, science education researchers and teachers work together on learning communities to transform this…