What does the lease agreement say? I thought there was no real incentive to pay it off early, but you might find out otherwise. I really don't know.
Dave says not to lease at all, but since you are already in it, you need to see how to get out of it.
Are you intending to purchase the car when you finish? If so, I would go to the dealer and ask for a buyout now and see if there is a savings there. If not, you may just be stuck with it until the end of the lease.
Dawn