Free Grade 3 Bias Lesson Plans
Free Grade 3 lesson plans for 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
Core
25 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain bias
Explain bias accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate bias
Calculate bias accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare bias
Compare bias accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify bias
Justify 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 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 9, Blue 13, Green 12, Yellow 2. In a pie chart, what angle does Red get?[1]
- 2.In a survey: Red 6, Blue 13, Green 11, Yellow 10. In a pie chart, what angle does Red get?[1]
- 3.In a survey: Red 11, Blue 9, Green 4, Yellow 15. In a pie chart, what angle does Blue get?[1]
- 4.In a survey: Red 2, Blue 14, Green 13, Yellow 15. In a pie chart, what angle does Yellow get?[1]
- 5.In a survey: Red 9, Blue 12, Green 5, Yellow 12. In a pie chart, what angle does Blue get?[2]
- 6.In a survey: Red 3, Blue 12, Green 13, Yellow 10. In a pie chart, what angle does Red get?[2]
- 7.In a survey: Red 11, Blue 10, Green 3, Yellow 6. In a pie chart, what angle does Green get?[2]
- 8.In a survey: Red 6, Blue 14, Green 3, Yellow 14. In a pie chart, what angle does Blue get?[2]
- 9.In a survey: Red 11, Blue 6, Green 11, Yellow 15. In a pie chart, what angle does Red get?[3]
- 10.In a survey: Red 4, Blue 2, Green 13, Yellow 11. In a pie chart, what angle does Blue get?[3]
- 11.In a survey: Red 10, Blue 8, Green 2, Yellow 4. In a pie chart, what angle does Green get?[3]
- 12.In a survey: Red 9, Blue 9, Green 4, Yellow 13. In a pie chart, what angle does Blue get?[3]
Show answers and working
1. 90°
Total = 36. Red fraction = 9/36. 9/36 × 360° = 90°.
2. 54°
Total = 40. Red fraction = 6/40. 6/40 × 360° = 54°.
3. 83.1°
Total = 39. Blue fraction = 9/39. 9/39 × 360° = 83.1°.
4. 122.7°
Total = 44. Yellow fraction = 15/44. 15/44 × 360° = 122.7°.
5. 113.7°
Total = 38. Blue fraction = 12/38. 12/38 × 360° = 113.7°.
6. 28.4°
Total = 38. Red fraction = 3/38. 3/38 × 360° = 28.4°.
7. 36°
Total = 30. Green fraction = 3/30. 3/30 × 360° = 36°.
8. 136.2°
Total = 37. Blue fraction = 14/37. 14/37 × 360° = 136.2°.
9. 92.1°
Total = 43. Red fraction = 11/43. 11/43 × 360° = 92.1°.
10. 24°
Total = 30. Blue fraction = 2/30. 2/30 × 360° = 24°.
11. 30°
Total = 24. Green fraction = 2/24. 2/24 × 360° = 30°.
12. 92.6°
Total = 35. Blue fraction = 9/35. 9/35 × 360° = 92.6°.
Worked examples
In a survey: Red 10, Blue 6, Green 5, Yellow 7. In a pie chart, what angle does Green get?
- Total = 28.
- Green fraction = 5/28.
- 5/28 × 360° = 64.3°.
- Answer: 64.3°
In a survey: Red 6, Blue 12, Green 9, Yellow 14. In a pie chart, what angle does Red get?
- Total = 41.
- Red fraction = 6/41.
- 6/41 × 360° = 52.7°.
- Answer: 52.7°
In a survey: Red 6, Blue 4, Green 7, Yellow 14. In a pie chart, what angle does Blue get?
- Total = 31.
- Blue fraction = 4/31.
- 4/31 × 360° = 46.5°.
- Answer: 46.5°
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 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, Sampling, Data Presentation. 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 Bias?
- Move on to Averages, Data Presentation, which build directly on this idea.
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