Amazon is no stranger to discounting its services for college students. You've still had to pay for Prime by the year, however, which can seem wasteful if you're only on campus for some of the year. Thankfully, you won't have to pay more than you have to. Amazon has introduced a by-the-month option for students that asks you to pay $5.49 per month only for as long as you need it. If you don't need fast shipping when you leave for summer break or have no inclination to watch The Tick during exams, you can put that money to better use.