Movie on dvd about kids in high school joining a gang?

I recently saw a commercial online about a movie thats now on dvd about asian high schoolers quitting school and joining a gang. the main actor in the movie has longish blonde hair and dresses preppy.in the commercial it explains the movie in a 3 step process. i assume this is an american film since i live in the states and i saw it on an american website fyi. can someone please tell me the title of this movie please