# 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

• Bring these devices into the lesson.

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 How do you find the circumference of a circle πr^2 How do you find the mean/ average of 5 numbers add together & divide by 5 What is √144 12 How many days in a fortnight 14 How many minutes in 2 & 1/2 hours 150 minutes A regular unbiased die is rolled once. What is the probability of rolling a 4 1/6 Draw the intersection of two circles in a Venn Diagram appropriate diagram How many degrees in a straight angle 180 If €1 is equal to \$2, how many dollars will I get for €70 \$140 What 4 coins would you need to pay a motorway toll of €1.90 €1, 50c, 20c, 20c What is the value of π 3.14 What is the perimeter of a square whose side measures 5cm 20cm What is the area of a rectangle with a length of 20m and a width of 2m 40m^2 Round 137.26 to the nearest whole number 137 Which of these is larger 80% or 0.08 80% How many metres in 1.2km 1200m If 1/3 of my journey takes 10 minutes, how long will the FULL journey take 30 minutes Draw a right-angled triangle appropriate diagram How many halves are in 2- maybe draw pictures to help 4 How many sides does a hexagon have 6

### Maths Week 2018 tough: QR Challenge

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