Subway has a back-to-school promotion going on right now. If you buy a $25 Subway gift card for yourself or your back-to-schooler, you can get a regular 6-inch sub on The House. Specialty menu items are not valid for this offer. You or your child can then use the $25 gift card through out the semester or school year, and have Subway for lunch when you haven't packed lunch or when the cafeteria menu doesn't appeal to you. Subway sandwiches healthy and nutritious (provided you don't get the creamy, sodium-laden sauces, no matter how good they taste), and they are already a great deal, so why miss out on a free sub? You can view the offerLog In. Expiry date is not indicated.