Review, assess, introduce, or reteach this super important concept in an engaging way. QR codes are a great way to integrate technology and are so easy to use! All you need is a smart phone, Ipad, or tablet. Students will solve area questions using QR codes. Electronics + math = highly engaged students. This product is perfect for that end of year assessment to decide if the students really grasped area or not. This correlates to 3.MD.5, 3.MD.6, and 3.MD.7, but can also be used with 4th grade as a review.