QR codes developed around pictures of Place Value number models. Students scan each code using a free QR scan app on the device in your room....you'll need access to iPads, iPods, or iPhones to use these QR codes.
After students scan the codes, they'll record the number on the record sheet. On this sheet they'll add/subtract 100, as well as add/subtract 10 from the number they discover.
Answer sheets are provided.