Assessment Assessment is one of the most difficult task of teaching activity since it is not only about grading the learners' achievements at the end of each unit but it is a continuous measures that is developed before, during and after teaching practice. The relevance of assessment is even greater in CLIL classes because of the own features of this methodology, becoming a difficult and contentious topic for teachers. Firstly, language and content learning are integrated in the same school subject and therefore the assessment should be designed with this double focus. The key element is how to blend the language matter and content without putting in risk the subject goals. At the beginning of the course, activities like pictures, grids or matching questions could be suited for assessing content. However, learners with a high command of language shall be assessed using tools where language take a more important role, for example an oral assessment