This is a fun way for your students to practice classifying triangles by sides (scalene, isosceles, equilateral) or angles (obtuse, acute, right). Students choose any card to start on. They scan the QR code, read the problem and solve it. Once they have the answer, they record it on the answer sheet. They will need to search the room for another card that has that answer on it. Once they find it they will see their next QR code to scan. It is so much better than a traditional worksheet. The students will have so much fun with the movement and technology that they won't even realize they are doing work! My students are actually excited to do the work. The 16 cards correlate with 4.G.2 from the fourth grade common core math objectives. This product is also available in a non-QR format.