Mean Girls comes to mind. The Breakfast Club is a classic one.

Heathers, The Craft, Mean Girls

You don't know mean girls? No wonder you're not developing properly.

Mean Girls, The Hot Chick, The Perks Of Being A Wallflower, Clueless, 10 Thing's I Hate About You, John Tucker Must Die

The Breakfast Club
The Craft
Clueless

A lot have already been mentioned but I'd add to that Jawbreaker (1999).

Mean Girls

If you want something that not too heavy and little bit cheesy go for Mean Girls.. If you want something little bit dark and odd then go for Easy A.
I'm not that familiar with 80's and 90's teenage movie so I can't tell you.

P.s. Easy A >>>> Mean Girls >>>>>>>> trash >>>> Mean Girls 2.

Nightmare On Elm Street