<< find the maintenance dept. at school and ask them to cut it---they should have some bolt cutters. >>
You guys are sorely underestimating the strength of a decent U-lock. There is NO way you would get bolt cutters through a Kryptonite lock, and it would take hours (and probably several blades)to get through one with a hacksaw.
From alt.locksmithing:
How do I open a Kryptonite lock?
Easiest: If you registered your lock, call or write Kryptonite for a new key. Or call a local locksmith, they should be able to pick and re-key the lock for you.
Easy: Get a car jack and jack it apart. Careful, otherwise it is very possible that you'll damage the bike.
Easy: Use a cut-off wheel in a Dremel tool to cut the lock at the hole in the shackle (where there is the least to cut.)
Harder: If it doesn't have the newer brass jacket, peel back the plastic coating on the key end, drill out the pin that holds in the cylinder, remove the cylinder, open.
Hardest: Chill the metal of the "U" with liquid Nitrogen or Freon, smash with hammer. While this is a "well known" method, it may be an urban legend.