I have created a super fun activity for kids and tech savvy teachers to use. Better than boring pencial and paper work! The first activity has students rounding and checking their answers with QR code readers. The second activity consists of several story problems of various operations where students are asked to round the answer to a certain place. Students scan their answer to check. If they are correct a word will pop up. In the end, a riddle will form.Hope your students enjoy this one!