A reminder for everyone who has been in high school of the sort of thing that happens. Granted, this is a movie, and the way it's portrayed is somewhat extreme, however you'll still get pangs of nostalgia regardless which clique you used to hang with (or didn't).
The movie is loaded with awkward moments and some campy humor; you won't leave the theatre contemplating some hidden deep meaning.
It will, however, bring a tear to your eye and a smile to your face - it's entertaining for any member of the family from teens on up.