This product contains problems that pertain to the common core math standard 5.OA.1 (order of operations). It can be used to challenge the higher-level students, as a center activity, for early finishers, or to review the concept. Students locate the first calculator that says "Instructions", which they have to scan with a QR reader to read. Make sure that iPads or other mobile devices have the free QR reader app downloaded. The students must then solve various levels of order of operations problems to complete a scavenger hunt. They will scan the calculator that says "Start" to find their first problem and then locate the calculator with the answer that holds the QR with the next question, which they record on their student answer sheets. The kids LOVE these!