I got a whole list of them and most have already been mentioned.
In no particular order.
The Breakfast Club
Ferris Beuller's Day Off
Fast Times at Ridgemont High
Better Off Dead
Pretty In Pink
She's All That (I wish I knew why I loved this movie so much besides just Rachel Leigh Cook)
The Last American Virgin
Bill and Ted's Excellent Adventure
Angus (Kind of cheesey but I liked it)