Measures of Spread
Students will calculate and interpret range, interquartile range (IQR), and standard deviation (introduction) to describe data variability.
Key Questions
- Explain how measures of spread quantify the variability within a data set.
- Differentiate between range and interquartile range in terms of their robustness to outliers.
- Predict how adding an outlier to a data set will affect its standard deviation.
Ontario Curriculum Expectations
Suggested Methodologies
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Planning templates for Mathematics
5E Model
The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.
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Plan a multi-week math unit with conceptual coherence: from building number sense and procedural fluency to applying skills in context and developing mathematical reasoning across a connected sequence of lessons.
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Build a math rubric that assesses problem-solving, mathematical reasoning, and communication alongside procedural accuracy, giving students feedback on how they think, not just whether they got the right answer.
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