Apple has launched their Back to School promotion for 2013:
Buy a Mac for college, get a $100 App Store Gift Card — and also save with education pricing. Or buy an iPad or iPhone and get a $50 card.
You’ll receive your App Store Gift Card with your purchase when you buy a qualifying product from one of these stores:
• Apple Online Store for Education
• Apple Retail Store
• Apple Authorized Campus Store
To qualify for the App Store Gift Card and get education pricing on a Mac, you must be a college student, a student accepted to a college, a parent buying for a college student, or a faculty or staff member from any grade level.
More info here.