# Teacher Notes

## A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

• Bring these devices into the lesson.

4. Cut them out and place them around your class / school.

## B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!

## C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

### Questions / Answers (teacher reference)

 Question Answer 6+12 18 2. 19-9 10 3. 25+18 43 4. 34-16 18 5. 8×9 72 6. 42÷7 6 7.thousands digit 18436? 8 8. 14×11 154 9. What is the remainder of 242 ÷ 7? 8 10. (estimate) 115 + 456 + 223 794 11. 4 × 1 + 3 × 100 + 9 × 1000 9304 12. Round 27.65 (whole number). 28 13. CXXI = (Arabic Numerals). 121 14. 123 + 49 172 15. 23 × 12 276 16. 16 × 25 400 17. 189 ÷ 3 63 18. 72 × 15 1080 19. The sum of the even numbers between 1 and 21 is 110 20. (estimate) 1634 × 14 20000 21. 363 × 11 3993 22. GCD of 126 and 189 is 63 23. 35+75 110 24. 353 + 648 1001 25. 7 nickels + 7 pennies 42 26. 53 × 57 3021 27. 34 ×21 714 28. What is the sum of the primes between 1 and 21? 59 29. 19 : 76 = 23 : 80 30. 1011 squared 2022 31. 6 feet = inches 72 32. 12 +34 46

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