If your class offers such then get a copy from the instructor. The titles you mentioned are only downloadable as trials so that won't do for your class.
If these are torrents or illicit software then it's TRUE it should take hours as the copyright holders actively interfere with such things.
I am attempting to download Adobe Creative Design Suites CS6 for my Graphic Design class, and when I try to do this, it tells me it is going to take 85 HOURS to download, and that is ridiculous. I'm also having similar problems trying to download Autodesk 3dMax. I don't have internet at home, so have to use a wireless Wi-Fi connection to do this. I hope you can help!