What movie to show my film class?

[TheBlueMonster]

I teach 9th and 10th grade film classes at a private school. Today I showed my 10th graders "Raising Arizona", which they loved. However, I'm a little hesitant to show my 9th graders the same movie next week.
The 9th graders are way more immature than their 10th grade counterparts. They also don't have nearly as much film knowledge (half the class didn't know who Robert DeNiro is!!!!!!)
Frankly I don't know if they'd be able to appreciate it.

Any suggestions of similar alternatives to show my little freshmen? Preferably some sort of comedy...