I too have never seen the television series "Glee". However, if the students in the programme were in the UK, the law would make provision for them and/or the teaching staff to use material in exactly the way that appears to be shown in the programme, and in exactly the same way as material is used IRL. The Text of the Copyright and Patents Act (1988) states:
Copyright in a sound recording, film, broadcast or cable programme is not infringed by its being copied by making a film or film sound-track in the course of instruction, or of preparation for instruction, in the making of films or film sound-tracks, provided the copying is done by a person giving or receiving instruction.
copyright wrongs righted
I too have never seen the television series "Glee". However, if the students in the programme were in the UK, the law would make provision for them and/or the teaching staff to use material in exactly the way that appears to be shown in the programme, and in exactly the same way as material is used IRL. The Text of the Copyright and Patents Act (1988) states: