I use a USB drive at my school. Fortunately the port isn't blocked; the only downside is that some of the computers it won't work for some reason. When I start anthem, it just goes into the setup program and when I close that, it goes to setup again. But many computers it works just fine. But yeah, use it on a USB drive, don't install on the school computer.
As for the ports... well, you can talk to your tech department but I doubt they'd be too sympathetic to that

Still, you could try. Best of luck, anyways.
P. S. This week is midterms for us. So far I'm doing fine. Of course I don't have grades this semester, but so far I've always had As except for one B last semester. And I'm lazy as hell, spend far too much time gaming, etc. So it can be done, you just have to be smart ;-)