language competence of the teacher,students' level of english,resources to prepare clil classes,different levels inside the class,how to assess students,the subject´s content level,speaking,attitude against the foreign language,family doubts,number of students,low participation,content of lessons is reduced,improving my level of english,other teachers at school doubts,lots of time to prepare the lessons,speaking in the foreign language,assesment tools,the organisation inside the classroom,difficulty in speaking in the foreign le,extra motivation,working with 25 kids at the same time!,cooperative and inclusive tasks,