First and foremost, don't arbitrarily block Linux users for web interfaces. McGraw Hill does, or did in the past and so do others. I spent hours contacting their useless support and playing politics with the college to get this changed, to no avail. At first, I could simply change my useragent and sneak in, with everything working well enough. When they 'smartened up' (or whatever) a bit, they effectively kept me out thereafter. This was a very nasty and persistent problem for me and one I won't forget.

Also, I never once found McGraw Hill software helpful. It seemed a cheap, shameful way to employ 'professors' otherwise too inept and uncreative to manage their own coursework and classes. At the undergraduate level, many colleges are becoming odious rackets (by my observations). McGraw Hill et al are indispensable allies here. Be different, be effective, be honest about education. Real education isn't a gravy train.