Pre-production is all about getting set before the camera actually rolls. And although this section is titled 'Script' there are a number of stages before and after that you might well need to consider. Like a quick synopsis to explain to your class why your idea is great through to a full storyboard of the action involved.
How much does it cost to make a film with young people depends on a number of variables.
Timetabling a shoot for a professional crew and cast is a pretty involved job, and in a school or workshop environment, good planning will make everything on the day that bit smoother.