# 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 Add together seven and seventy-seven. 84 How many tens are there in one hundred and twenty? 12 What is one-quarter of two hundred? 50 How many minutes is it from eleven twenty five to twelve o’clock? 35 How many grams are there in zero point one kilograms? 100g How much must be added to six pounds eighty to make ten pounds? £3.20 Add together eighteen and half of eighteen. 27 Subtract ten lots of ten from one thousand. 900 A number is doubled and then twenty is added to the result. The answer is sixty-four. What was the original number? 2242 How many quarters are there in two and a half? 10 What is half of zero point seven? 0.35 Write the multiple of six that is closest to forty. 42 Subtract one point three from three point one. 1.8 Write three-quarters of a million in cures. 750,000 Double thirty, then subtract five, then double the result. 110 The perimeter of a rectangle is thirty centimetres. The two longer sides are eleven centimetres each. How long is each of the shorter sides? 4cm Subtract forty four from five hundred and forty. 486 Two hundred grams of cheese cost two pounds forty pence. How much does one kilogram of cheese cost? £12.00 What number must you multiply by two and a half to get twenty? 8

### 6T Maths Quiz: QR Challenge

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