Math Market using QR codes. Each Code has corresponding pictures and when the code is scanned on an Ipad, the item name and price comes up. Also includes coupons students can use to subtract from their total if they buy the right quantity of different items, as well as receipts for showing their work and recording purchases. My students love to post the receipts on our bulletin board with cutouts of items they bought. Great for applying real-world math knowledge and practicing adding and subtracting with decimals.