Bilingual education has become popular in many countries in the last two decades. It is generally acknowledged that learning a second language (L2) through subject content has a positive impact on students' L2 learning, but there is less agreement on whether this also applies to learning subject content knowledge in and through L2. This…

English connects all areas of science around the world. Productive and receptive English-language skills are thus a crucial tool that schools must provide their students with in order to prepare them for higher education and professional life. The introduction of bilingual instruction of subject matter, often referred to as Content and Language…

The dominant role of English as the global language of science entails a requirement for science teachers to equip their non-native English-speaking students with receptive and productive language skills for communication in scientific contexts. Although science courses with English elements are part of some schools' bilingual programmes, they are…