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QR Challenge: Proportional Thinking

Created using the ClassTools QR Treasure Hunt Generator

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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

3. Print out the QR codes.

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

1. In a bag of marbles, there are 2 green marbles for every 3 red marbles. If there are a total of 55 green and red marbles, how many marbles are red?72
2. A tree that is 15 feet tall casts a 10-foot shadow. What is the length of the shadow of a nearby 21 foot tall tree?40
3. One dozen doughnuts cost $6. If the unit price is the same, how many doughnuts can be bought with $168
4. Twenty percent of a class is made up of girls. If there are 40 students in the class, how many are girls?45
5. Michelle makes 4 free throws for every 15 she attempts. If she attempts 60 free throws, how many will she miss?56
6. A 6-ounce can of frozen concentrate produces 2 quarts of orange juice. How many ounces of frozen concentrate would be needed to make 2 gallons of orange juice?75

 


Proportional Thinking: QR Challenge

https://www.classtools.net/QR/decode.php?text=In-a-bag-of-marbles,-there-are-2-green-marbles-for-every-3-red-marbles.-If-there-are-a-total-of-55-green-and-red-marbles,-how-many-marbles-are-red?

Question 1 (of 6)

 


Proportional Thinking: QR Challenge

https://www.classtools.net/QR/decode.php?text=A-tree-that-is-15-feet-tall-casts-a-10-foot-shadow.-What-is-the-length-of-the-shadow-of-a-nearby-21-foot-tall-tree?

Question 2 (of 6)

 


Proportional Thinking: QR Challenge

https://www.classtools.net/QR/decode.php?text=One-dozen-doughnuts-cost-$6.-If-the-unit-price-is-the-same,-how-many-doughnuts-can-be-bought-with-$16

Question 3 (of 6)

 


Proportional Thinking: QR Challenge

https://www.classtools.net/QR/decode.php?text=Twenty-percent-of-a-class-is-made-up-of-girls.-If-there-are-40-students-in-the-class,-how-many-are-girls?

Question 4 (of 6)

 


Proportional Thinking: QR Challenge

https://www.classtools.net/QR/decode.php?text=Michelle-makes-4-free-throws-for-every-15-she-attempts.-If-she-attempts-60-free-throws,-how-many-will-she-miss?

Question 5 (of 6)

 


Proportional Thinking: QR Challenge

https://www.classtools.net/QR/decode.php?text=A-6-ounce-can-of-frozen-concentrate-produces-2-quarts-of-orange-juice.-How-many-ounces-of-frozen-concentrate-would-be-needed-to-make-2-gallons-of-orange-juice?

Question 6 (of 6)