QR Challenge: Ratios and Unit Rates

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. 100 pieces of candy were passed out to 20 trick-or-treaters	5 pieces of candy per trick-or-treater
2. 1353 bats in 11 caves	123 bats per cave
3. 50 ghosts in 10 haunted houses	5 ghosts per haunted house
4. 728 mad scientists attended 182 Halloween parties	4 mad scientists per Halloween party
5. 35 caramel apples for 7 kids	5 caramel apples per kid
6. 552 pumpkin seeds per 92 cups of witch's brew	6 pumpkin seeds per cup of witch's brew
7. 20 pumpkins in 5 yards	4 pumpkins per yard
8. 18 zombie movie tickets cost $117	$6.50 per ticket
9. 172 students hung out at 2 Halloween Dances	86 students per dance
10. $31.50 for 7 cupcakes	$4.50 per cupcake
11. 204 costumes were sold in 6 days	34 costumes per day
12. 150 goblins carved 30 jack-o-lanterns	5 jack-o-lanterns per goblin
13. $18 for 4 Halloween masks	$4.50 per mask
14. 140 pieces of candy corn for 20 cookies	7 pieces of candy corn per cookie
15. $7.20 for 6 bottles of potion	$1.20 per bottle
16. 828 spiders in 36 webs	23 spiders per web
17. The teacher passed out 60 candy bars to 15 students	4 candy bars per student
18. 654 warts on 6 witches	109 warts per witch
19. Mary ate 15 pieces of candy in 3 hours. How long will it take her to eat 105 pieces of candy?	7 hours

 

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