QR Challenge: Rates and Ratios

Created using the ClassTools QR Treasure Hunt Generator

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.

3. Print out the QR codes.

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

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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!

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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.

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Questions / Answers (teacher reference)

Question	Answer
1. 1)A soccer team played 25 games and won 17. What is the ratio of the number of wins to the number of losses	17:8
2. 2) There are 15 students in the preschool class. For every 7 kids there is one teacher. What is the ratio of teachers to the number of students in the class	1:7
3. 3) A coin is flipped to decide who will go first in the game. What is the ratio of the coin landing on heads	1:2
4. 4) Simplify the ratio 18:24	3:4
5. 5) Express 80m in 5s as a rate in simplest form	16m/s
6. 6) A cyclist travels at an average speed of 15km/h. How long does he take to travel 37.5km	2 hours 30 minutes.
7. 7) Divide 320m in the ratio 3:5	120:200
8. 8) A distance of 90km is represented by a length of 3cm. What scale is used	1:3 000 000
9. 9) Adam delivered 1080 bottles of milk in 6 hours. Find his hourly rate of delivery	180 bottles/hour
10. 10) Change 180km/h into m/s	50m/s

 

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