In Mrs. Bowers and Mr. Miller’s 2nd grade math class students are using QR codes to check their double digit subtraction. QR codes are similar to the bar codes at the grocery store. The students scan the QR code with an ipad and the answer is shown on the ipad. Students were given 15 problems and had to solve the problems before they used the ipads to scan the QR codes to see if they solved the problem correctly.