TABLE 1.

Structure of the interviews.

	Issues addressed
	Teachers’ interviews		Students’ interviews
Interview parts	Issues	Basic interview guide	Issues	Basic interview guide
“Ice-breaker” questions	Information on personal matters, language proficiency, work experience and educational, and training attainments.	What is your teaching experience (and using CLIL)? What is your English level? What specific training have you undergone to do CLIL?	Information on personal matters, general opinions about the subject.	• What do you think of Physical Education? • How do you feel about the subject?
General questions	Preparation of the classes.	• What is your general opinion regarding Physical Education with CLIL? • How do you prepare your CLIL lessons?	Learning in physical education The acquisition of language skills.	• Has CLIL hindered your learning of the subject? How? Why (not)? • Why was CLIL (not) helpful for language learning?
Specific questions	Class development: strengths, limitations. Differences between using and not using the CLIL approach.	• What are the advantages of using CLIL in Physical Education? • What are the disadvantages of using CLIL in Physical Education? • What are the differences in CLIL and non-CLIL Physical Education? And regarding motor and sport-specific skills/activity or movement/personal, social and moral development?	Advantages and disadvantages of the CLIL approach in physical education classes. Differences regarding classes without the CLIL approach.	• Why can CLIL be beneficial for students in Physical Education? • What are the disadvantages of using CLIL in Physical Education? • What are the differences in CLIL and non-CLIL Physical Education? And regarding motor and sport-specific skills/activity or movement/personal, social and moral development?
Conclusion question	Further observations