I saw this last night, and it was hilarious! Cameron Diaz is just awful, and she says the things that you secretly think but can't say out loud. For example, when grading papers she writes: "STUPID" "STUPIDER" and then "ARE YOU F-ING KIDDING ME?" So rude, but you just can't help laughing. There is also a "goody goody" teacher that you just can't help hating.
Definitely worth seeing!