Battle Royale (Batoru rowaiaru) 2000

A bunch of Japanese 9th grade classmates are put on an island and have to kill each other to be the sole survivor. Most awesome movie.

If you're a US filmgoer, you might remember Chiaki Kuriyama, she's that nasty little schoolgirl from Kill Bill.

Handled just right by director Kinji Fukasaku.
This was one of Quentin Tarantino's top 20 faves from 1992 on.

Quickie Synopsis
Bloody
Irreverent
Transfixing