QR Challenge: Multiplication and Division Bar Models

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. Jack has 4 boxes of mangoes for sale. Each box contains 12 mangoes. Kathy bought 25 mangoes from Jack. How many mangoes does Jack have left?	Jack has 23 mangoes left.
2. Zach has 342 stamps. Ron has twice as many stamps as Zach. How many stamps does Ron have?	Ron had 684 stamps.
3. A grower picks 60 oranges. The grower packs them equally into 5 boxes. How many oranges does the grower pack in each box?	The grower packs 12 oranges in each box.
4. A baker has 28 ounces of flour. He uses 8 ounces of it to make biscuits. He packs the remaining flour equally into 5 bags. How many ounces of flour does each bag have?	Each bag has 4 ounces of flour.
5. Fiona has 30 pounds of rice. She uses 10 ounces to make a rice salad. She packs the remaining rice into bags. Each bag has 5 ounces of rice. How many bags of rice does she pack?	Fiona packs 4 bags of rice.

 

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