Terrible movie that takes part in school which resembles a concentration camp, filled with bullying towards children that completely does not justify the time spent watching. Reason for which, BTW, I refrained from watching the whole movie.
The main character, and kids in general (referred to throughout the movie as verms that have to be crashed, in repeated occasions) is heavily bullied throughout the movie by her parents, by the principal and becomes a heroine when subverting the rules and when is mean and nasty. The main characters might be characterized as a psychopath.
Not a movie to watch with kids. An interesting movie to evaluate psychological profiles, but, even for that, it would need more sofistication and refinement.
In a nutshell, a bad taste movie, with cliches all over it, raw and shallow.