Apple has launched their 2011 Back to School promotion. When you buy a new qualifying Mac with Apple education pricing from June 16, 2011, through September 20, 2011, you’ll get a $100 Back to School Card to use on the Mac App Store, the App Store, the iTunes Store, and the iBookstore.
You must be a qualified Apple Education Individual end-user purchaser, and not a reseller, to obtain this promotional offer. Products must be purchased from Apple Retail, Apple Telesales, or the Apple Online Store and delivered to an address in the 50 United States or the District of Columbia.
More info via Apple Store here.