QR Challenge: Subtraction word problems 4

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. 6527 people are watching a football match. 1708 people left at half time. How many stayed to watch the rest of the match?	4549
2. 2. Willy Wonka has 2542 Ooompa Loompas working in the Chocolate Factory. An experiment went wrong and 834 Ooompa Loompas disappeared. How many are left in the factory?	1708
3. 3. There has been a fire in London. The Police investigate and finds out there are 3902 witches involved. The Police only managed to catch 1635. How many more do they need to catch?	2267
4. 4. An orphanage of 2974 children were woken up by the BFG. He decides to take 1315 for an adventure. How many children are left in the orphanage?	1659
5. 5. There has been a fire in London. The Police investigate and finds out there are 3195 witches involved however the Police only managed to catch 1299. How many more do they need to catch?	1896

 

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