CLIL (Content and Language Integrated Learning) is a recent teaching approach widely adopted in numerous international contexts, especially in Europe where it was promoted as a way to promote language learning within the educational system. When implemented, CLIL predominantly involves subject content teachers using English to teach their subject.…

This article recounts three studies that portray an evolution from research examining the effects of researcher-designed instructional interventions to research examining the impact of helping teachers to design their own instructional interventions. Study 1 investigated the effects of an instructional treatment designed by the research team on…