# 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

• Download a QR reader (e.g. I-Nigma | NeoReader | Kaywa) onto their mobile devices
• 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 1. 13 1/2 + 1/2 14 2. 18 2/4 - 14 1/2 4 3. 1 1/2 + 4/8 2 4. 10 3/12 - 1/12 10 2/10 5. 2 3/4 + 23 3/12 26 6. 5 6/8 - 4/8 5 2/8 7. 12 3/9 + 1 6/9 14 8. 15 1/6 - 12 1/3 3 1/16 9. 4 2/10 + 9 1/20 13 5/20 10. 20 1/10 - 2 2/20 18 11. negative times a positive equals a negative 12. a negative times a negative equals a positive 13. if you borrow \$10.50 and you borrow \$12.75 how much do you owe to pay back? -23.25 14. if you borrow \$25 and earn \$20 and you pay \$20 of the money that you borrowed how much do you have left to pay? -5 15. if you borrow \$45 and you get a check for \$60 and you pay the \$45 how much will have left? \$15

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