Another high school survival film - a genre of its own that I never seem to get bored of.

It's a pretty self-explanatory concept - a bunch of kids are locked in school where they must do their best to survive.
Yes, it's relatively predictable, and doesn't necessarily offer something new that hasn't already been done, but it's still interesting and a fun, mindless watch. Of course despite this, there is a lot of gore. So be mindful if it's not your thing. Especially since most of the deaths are by suicide.

The cast did a good job, with some actors playing roles I had never seen them do, which was refreshing to watch. You don't find out too much about the characters' backstory, but their individual personalities are made quite clear, and you find yourself aligning with certain characters and rooting for them.

Definitely something to give a try if you're interested in this trope/genre and like the actors.