Similar to immersion, Content and language Integrated Learning (CLIL) combines second language education with other content-subjects and has become an important educational approach in many parts of the world. Only recently research on CLIL classrooms has started to emerge on the international scene. This volume presents current work dealing with classrooms located in Australia, Austria, Belgium, Finland, Germany and the UK, focussing on various dimensions of classroom talk such as oral proficiency, repair, the structure of learning opportunities, cognitive effects, pragmatic differences from traditional EFL lessons as well as issues of research methodology. These are complemented by the discussion of educational policies and the perceptions and attitudes of CLIL teachers.