# 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 Are 2/5 and 6/15 equivalent fractions? yes What is the simplest form of 16/24? 2/3 Write an equivalent fraction for 8/12. Answers will vary. Which fraction is larger, 6/7 or 4/6? 6/7 Which fraction is smaller, 4/5 or 1/3? 1/3 4/6 + 1/6 = 5/6 3/12 + 5/12 = 2/3 3/9 + 1/3 = 2/3 2/14 + 3/7 = 4/7 1/2 + 3/10 = 4/5 3/8 + 4/16 + 1/4 = 7/8 7/9 - 2/9 = 5/9 7/8 - 3/4= 1/8 8/10 - 3/5 = 1/5 1 - 1/3 - 2/6 = 1/3 7/15 - 1/5 = 4/15 Mr. Smith has 1/3 kg of sugar. He buys another 4/9 kg of sugar. How much sugar does he have altogether? 7/9 kg Amy has 5/8 m of cloth. She cuts 1/4 m of it to dress her doll. How many meters of cloth does she have left? 3/8 m Write the following as a mixed number: 3 wholes 2 fifths. 3 2/5 Write the following as a mixed number: 5 wholes 4 ninths. 5 4/9 Add 4 + 6/11 = 4 6/11 Add 8/13 + 9 = 9 8/13 Subtract 2 - 5/9 = 1 4/9 Subtract 7 - 3/12 = 6 3/4 Change 17/2 into a mixed number. 8 1/2 Change 19/5 into a mixed number. 3 4/5 Write 4 5/6 as an improper fraction. 29/6 Write 7 2/9 as an improper fraction. 65/9 Charlie has 15 kg of rice. He puts the rice equally into 4 containers. How much rice, in kg, is there in each container? 3 3/4 What is 1/3 of 12? 4 What is 1/6 of 36? 6 What is 2/5 of 45? 18 What is 4/9 of 27? 12 Jill bought 42 eggs. She broke 1/6 of them. How many eggs were broken? 7 There are 32 children in a class. 3/8 of them are girls. How many boys are in the class? 20 boys

### World of Fractions Review: QR Challenge

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