The over-written screenplay

I'm appalled every time I judge a screenwriting contest to see how many scripts are over-written, even hugely over-written, as if the writer assumed s/he were writing a novel in a different format. Where are they getting such wrong information?

I just talked to a student who has this typical problem but has quickly and easily corrected it. In another class at another college here in town she over-wrote but the teacher never said a thing about it. What!?? Well, the teacher was a playwright with no experience in the real world of screenwriting, especially with regard to spec screenplays ... and I fear this is a universal problem, some playwright or fiction writer being assigned to teach the screenwriting class when they have no experience in Reality 101 in the evolving world of screenwriting. The students are the ones who suffer, and it's too damn bad.