Well, firstly, a couple of questions (seven, actually)....
What stock are you shooting? 7277 might be ok, 7274 or anything slower than that and you are probably going to be facing some exposure challenges.
How fast are your lenses?
What kinds of instruments (and wattages) are in your three-point kit?
What is your action/blocking? A couple of actors standing and talking in a hallway is one thing, but if they walk-and-talk 30 yards down the hallway that's something else.
What kind of available light (if any) is in the non-classroom areas? Any windows? Flos?
Are
any other lighting instruments available? Even non-photographic instruments, such as shoplights, clip-ons, or halogen work lights?
What kinda of "look" are you going for? Something beautiful? Something grittier more documentaryish/natural? Other?
T2
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Todd Terry
Creative Director
Fantastic Plastic Entertainment, Inc.
fantasticplastic.com