Pretty sure when you download it comes as an ISO. I bought the student version a while back this way, as long as you have a valid .edu email address you're fine. $65 for Windows 7 Professional (it's the upgrade version but as far as I know if you make the disc bootable you should be fine for an install from scratch.... I'd double check first though).
Originally Posted by tacosRcool
I got an upgrade to Windows 7 pro for $25 at my university