Hello Pedro and friends,
About the movie, I agree that this kind of things happens with Brazilian students, for sure. I feel terrible because I don't like to see students and teachers "batendo boca", I really feel very bad and it's like the students and teachers are the same and they aren't. The teachers are adults and needs to be more controlled, but it's impossible sometimes, for that reason things like that happens.
This situation didn't happen with me, but I already saw friends of mine living this situation. It's difficult to say who is right, but I understand the teacher.
kisses,
Carlota