I remember watching a film years ago on tv that I never knew the name of. I don't even remember if it was good, but for some reason the memory of watching it comes back to me every once in a while. anyway, enough of that onto what I actually remember....
The images that come to mind are of a class of students in a kind of 80s or early 90s American teen film type environment (there's the jocks, the prissy girl, the stoners...) and they get a new teacher in cos their old one is dead or something. Anyway, they start off trying to fuck with the teacher and pull crazy pranks, but I think they end up liking him (at least that's what usually happens in these film). Unfortunately this concept is so over done, that it doesn't help with what the film is.
The only two things that I guess would help differentiate this film from a million others is that I think the school was near a beach or they all go to the beach and surf and stuff, and that two of the stoner types in the class are into film SFX and at one point play a prank on the teacher by making it look like everyone in the class has been brutally murdered with circular saw blades sticking out of their necks and blood everywhere.