Introduction
- Warmer:
- Let students explore on PhET Simulation: Fraction Matcher
- https://phet.colorado.edu/en/simulations/fraction-matcher
- Play Level 1 and Level 2
- Asks students:
- What do the parts of the circle mean?
- How is this like a pie chart?
- Paste frequency table on the board showing how Year 7 students spend their free time
|
Activity |
Number of Students |
|
Sports |
6 |
|
Reading |
4 |
|
Gaming |
5 |
|
Social media |
3 |
|
Sleeping |
2 |
- “How can we show this information in a way that’s easy to understand?”
- “Which activity do most students enjoy the most?”
In this WebQuest, you will become Pie Chart Detectives
You will explore how to make and read pie charts using fun online tools, learn how to calculate sector angles, and create your own colorful pie chart to show real data from your classmates
Task
Task:
Your mission is to:
- Explore how pie charts show information using online interactive tools
- Collect your own data from classmates
- Calculate each sector angle using the correct formula
- Construct your own creative and accurate pie chart
- Interpret your chart and explain what it shows
Process
Step 1: Explore – What is a Pie Chart?
Part A: Visual Exploration
- Ask students to open video tutorial link provided that shows how to draw a pie chart using a compass and protractor
- https://www.youtube.com/watch?v=p_nPxTRuLxo
- Then ask students to explore the Interactive Pie Chart Tool in the link provided
- Ask questions to students:
- What do you see when one part gets bigger?
- What happens to the other parts?
- How does the chart hep you see the data easily?
Step 2: Collect Data
- Choose one topic:
- Favouite fruits
- Favourite school subjects
- Types of pets owned
- Work in small groups to survey at least 10 classmates and record results in a frequency table
Step 3: Calculate Sector Angles
- Use the provided link for notes to guide you on how to calculate sector angles
- https://www.mathsisfun.com/data/pie-charts.html
Step 1: Find the Total Frequency
-
- Add up all the numbers in your frequency table
Step 2: Use the Formula
Step 3: Calculate Each Sector Angle
-
- Use the formula above
- Add up all each sector angle (360)
Step 4: Construct your Pie Chart
-
- Draw your pie chart manually using a compass or protractor, or
- Use an online tool to construct your pie chart
- https://nces.ed.gov/nceskids/createagraph/
- Make sure to label all sectors, add a title, and color each sector
Step 5: Interpret and Share
-
- Allow students to work in their small groups answering these simple questions
- Which part of the pie chart is the biggest?
- Which part is the smallest?
- What do the slices tell you about your data?
- Then share your pie chart with other groups
Evaluation
|
Criteria |
3 – Excellent |
2 – Satisfactory |
1 – Needs Improvement |
Marks |
|
1. Data Collection |
Collected clear and complete data from survey |
Data mostly complete with few errors |
Data incomplete or unclear |
/3 |
|
2. Sector Angle Calculation |
All angles correct and total = 360° |
Minor mistakes in angles |
Many errors or missing calculations |
/3 |
|
3. Pie Chart Construction |
Neat, labeled, colorful, and accurate |
Mostly neat with some small mistakes |
Messy, unlabeled, or inaccurate |
/3 |
|
4. Interpretation |
Clearly explains what the chart shows |
Gives some explanation |
Little or no explanation |
/3 |
|
5. Participation & Creativity |
Worked well in group and showed creativity |
Some effort and teamwork shown |
Minimal effort or participation |
/3 |
Conclusion
Well done, Pie Chart Detectives!
You have finished your mission successfully. You learned how to collect data, calculate angles, and draw your own colorful pie chart. You also discovered how each slice shows a part of the whole story.
Now you can:
- Collect data from your classmates
- Use the formula to find sector angles
- Draw and label a pie chart correctly
- Explain what your chart shows