Detailed Case Study Search the Archive Feedback

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.

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

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!

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

## Question | ## Answer |

1. Order from least to greatest -25, 25, 7, 0, -10, -16, -5, 1, -2, -1, 4, 5 | -25, -16, -10, -5, -2, -1, 0, 1, 4, 5, 7, 25 |

2. A baker bakes 752 muffins in a weekend. She sells the muffins in packs of 12. How many packs of muffins did she sell, and how many did she have left over? | 62muffins, 8 left over |

3. A laptop computer weighs 6.4 pounds. A notebook computer weighs 3.75 pounds. How much heavier is the laptop than the notebook? | 2.65 |

4. Lauren is helping her parents put a row of bricks in front of their garden. The length of the garden is 105 inches. If each brick is 7.5 inches long, how many bricks will be used for the row? | 14 |

5. Wanda meets her friend Jackie every 8 days. She meets her friend Audrey every 6 days. One day, she meets both Jackie and Audrey. In how many days will she next meet Jackie and Audrey? | 24 |

6. Mitchell is hired to paint a mural on a wall with an area of 21 1/8 square yards. The width of the wall is 3 1/4 yards. What is the length of the wall? | 6 1/2 |

7. Jerome burned 75 calories in 15 minutes on a stationary bicycle. How many calories will he burn in 25 minutes? | 125 |

8. A hardware store charges $18 for a 6-pack of energy-efficient light bulbs. What is the unit rate for the cost of 1 energy-efficient bulb? | $3 per bulb |

9. A brand of diet chips has 30% of the calories of the regular brand. If the diet brand has 90 calories, how many calories does the regular brand have? | 300 |

10. After 45 seconds, Camden's bathtub fills with 3 inches of water. How many seconds will it take to fill Camden's tub with 20 inches of water? | 300 |

11. What is 90% of 20? | 18 |

12. What is the value of x in the following equation - 4x = 6 | 1 1/2 |

13. Simplify the following expression - 2x + 12 + 3x + y + 13 | 5x + y + 25 |

14. Write an expression that is equivalent to - 4(x + 7y) | 4x + 28y |

15. What is the solution to 3x < 18? | x < 6 |

16. Xavier holds a number cube with sides that are 1.5cm long. Create a net for the cube. What is the surface area of Xavier's number cube? | 13.5 square cm. |

17. Which of the following is a measure of variability? a. mode b. interquartile range c. median d. average (mean) | b interquartile range |

18. The number of eggs laid by 8 different hens in a month are - 19, 23, 27, 24, 19, 22, 26, 24 - What is the mean absolute deviation (MAD) of the data set? | 2.25 |

19. John measured the low temperature each day during a 15 day period. The following list shows John's temperatures, in degrees Fahrenheit - 58, 49, 41, 56, 44, 45, 46, 60, 46, 55, 52, 53, 59, 53 - Create a box plot to show John's data | see student work |

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