Science education in the Arab world is conducted in various multilingual contexts. When science is taught in Arabic, diglossia -- the coexistence of the formal language of literacy alongside a local spoken variety -- constitutes a multilingual setting the pedagogical implications of which need to be understood. This study compares teacher--student…

The paper proposes a theoretical and methodological framework based on a pluralistic, concerted approach to the study of activities that take place in and through speech interactions. The framework has a general scope, applying to any collective activity taking form through language interactions. It contributes to a fuller understanding of the…