Since the earliest studies on multilingual advantages, it has proved difficult to disentangle language development from general cognition. It remains unclear whether language interdependence is an independent variable or whether observable effects are mediated by cognitive ability. Measurable effects of one language on another typically go hand in…

Empirical evidence exists that enhancing students' language can promote the mathematics learning of multilingual students at risk, whereas other target groups (e.g., monolingual students, successful students, both with diverse academic language proficiency) have hardly been considered. This cluster-randomized controlled trial (N = 589)…

In recent years, the issue of using bilingual education has come to the public's attention. A widespread belief is that students in bilingual classes achieve a higher competence in the language, but that they lag behind in subject-specific knowledge when compared to fellow students in traditional (i.e. monolingual) classroom settings.…