From my copy of Numbers on the iPad, the options available are email, copy to iWork.com or copy to iDisk. (I signed up to iWork about six months ago and it still seems to be working ok, but I never see it mentioned here). Any of these wouuld work assuming you have access from your colleges network machines to your email account or to iWork/iDisk.
I suppose you could also mess about with iTunes and a usb stick but that's a bit of a long way round.