I'm not sure if anyone has ever mentioned this movie and if they did, good for you. I fell in love with this movie instantly. I'll try not to give anything away.
So the movie revolves around a teacher who was, I guess, recently transferred to a really strict school. The kids there are very rude and play horrible pranks on some of the people who work there. So, this new teacher tries to make them a better group of kids so that they'll avoid being punished by having them sing.
Really heart warming. I haven't finished watching it but from where I left off, It was amazing. The movie is in french so if you ever come by it, I think it's better you use subtitles and not the dub. Dubs never really work for these kinds of movies.

Paranoid. =3