From Apple:
“Buy a Mac for college between June 11 and September 21 and receive a $100 Back to School Gift Card to use on apps, books, music, and movies. Or buy the new iPad and get a $50 Back to School Gift Card.* And if you choose a Mac, save even more with Apple Education Pricing.”
Remember students you also get educational pricing in addition to this: http://store.apple.com/us-hed/findyourschool