Free Grade 3 Introducing Bias Lesson Plans
Free Grade 3 lesson plans for Introducing Bias: 12 real questions with a full answer key and worked solutions. Charts show data visually. In a pie chart, each category's angle is its fraction of the total multiplied by 360°.
Free
Higher
30 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify introducing bias
Identify introducing bias accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain introducing bias
Explain introducing bias accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing bias
Calculate introducing bias accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing bias
Compare introducing bias accurately in a familiar context.
Assessed by: Exit ticket of four short items
Prerequisites
Close these gaps first — each has its own free lesson, worksheet and quiz.
How Introducing Bias works
Charts show data visually. In a pie chart, each category's angle is its fraction of the total multiplied by 360°.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.In a survey: Red 7, Blue 6, Green 6, Yellow 10. In a pie chart, what angle does Green get?[1]
- 2.In a survey: Red 15, Blue 8, Green 14, Yellow 7. In a pie chart, what angle does Green get?[1]
- 3.In a survey: Red 15, Blue 4, Green 15, Yellow 10. In a pie chart, what angle does Yellow get?[1]
- 4.In a survey: Red 6, Blue 8, Green 2, Yellow 7. In a pie chart, what angle does Red get?[1]
- 5.In a survey: Red 14, Blue 10, Green 5, Yellow 6. In a pie chart, what angle does Yellow get?[2]
- 6.In a survey: Red 2, Blue 3, Green 15, Yellow 10. In a pie chart, what angle does Blue get?[2]
- 7.In a survey: Red 11, Blue 13, Green 10, Yellow 14. In a pie chart, what angle does Red get?[2]
- 8.In a survey: Red 5, Blue 14, Green 3, Yellow 12. In a pie chart, what angle does Green get?[2]
- 9.In a survey: Red 4, Blue 15, Green 9, Yellow 8. In a pie chart, what angle does Blue get?[3]
- 10.In a survey: Red 12, Blue 14, Green 3, Yellow 13. In a pie chart, what angle does Yellow get?[3]
- 11.In a survey: Red 3, Blue 15, Green 5, Yellow 10. In a pie chart, what angle does Red get?[3]
- 12.In a survey: Red 13, Blue 5, Green 2, Yellow 13. In a pie chart, what angle does Blue get?[3]
Show answers and working
1. 74.5°
Total = 29. Green fraction = 6/29. 6/29 × 360° = 74.5°.
2. 114.5°
Total = 44. Green fraction = 14/44. 14/44 × 360° = 114.5°.
3. 81.8°
Total = 44. Yellow fraction = 10/44. 10/44 × 360° = 81.8°.
4. 93.9°
Total = 23. Red fraction = 6/23. 6/23 × 360° = 93.9°.
5. 61.7°
Total = 35. Yellow fraction = 6/35. 6/35 × 360° = 61.7°.
6. 36°
Total = 30. Blue fraction = 3/30. 3/30 × 360° = 36°.
7. 82.5°
Total = 48. Red fraction = 11/48. 11/48 × 360° = 82.5°.
8. 31.8°
Total = 34. Green fraction = 3/34. 3/34 × 360° = 31.8°.
9. 150°
Total = 36. Blue fraction = 15/36. 15/36 × 360° = 150°.
10. 111.4°
Total = 42. Yellow fraction = 13/42. 13/42 × 360° = 111.4°.
11. 32.7°
Total = 33. Red fraction = 3/33. 3/33 × 360° = 32.7°.
12. 54.5°
Total = 33. Blue fraction = 5/33. 5/33 × 360° = 54.5°.
Worked examples
In a survey: Red 4, Blue 6, Green 12, Yellow 7. In a pie chart, what angle does Red get?
- Total = 29.
- Red fraction = 4/29.
- 4/29 × 360° = 49.7°.
- Answer: 49.7°
In a survey: Red 12, Blue 13, Green 13, Yellow 2. In a pie chart, what angle does Red get?
- Total = 40.
- Red fraction = 12/40.
- 12/40 × 360° = 108°.
- Answer: 108°
In a survey: Red 13, Blue 6, Green 11, Yellow 13. In a pie chart, what angle does Green get?
- Total = 43.
- Green fraction = 11/43.
- 11/43 × 360° = 92.1°.
- Answer: 92.1°
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Uses 100 instead of 360 for pie-chart angles.
Correction: A full circle is 360°.
Forgets to find the total first.
Correction: Add all frequencies before working out fractions.
Teacher tips
- · Have pupils check that all angles add to 360°.
Parent tips
- · Look at charts in the news and ask what they show.
Real-life applications
- · News infographics, survey results.
Assessment objectives
How mastery is evidenced, and which standards it maps to.
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Frequently asked
- Is this Grade 3 Introducing Bias lesson plan really free?
- Yes. Every lesson plans on FreeMathWorksheet is free to use, print and share — no account, no paywall and no watermark.
- What should a learner already know before this?
- Start with Questionnaires. Each one has its own free lesson, worksheet and quiz.
- How is the lesson plan sequenced?
- Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
- What comes next after Introducing Bias?
- Move on to Working with Bias, Bias in Context, Sampling, Questionnaires, which build directly on this idea.
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