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By the end of the lesson, students will be able to:
- Construct cumulative frequency tables from raw data
- Draw and interpret cumulative frequency graphs
- Find median, quartiles, and interquartile range from CF graphs

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Students can:
1. Order and group data correctly
2. Plot cumulative totals accurately
3. Read values from CF graphs
4. Calculate key statistical measures

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Essential Question: 'How can we represent data to show running totals?' Students discuss in pairs and share ideas on a collaborative Padlet wall.

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Teacher demonstrates how to create a cumulative frequency table using real-life data (e.g., student heights in class)

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Drawing Cumulative Frequency Graphs - Corbettmaths

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In pairs, students create CF tables and graphs using given dataset about 'Time spent on social media'. Teacher circulates to support.

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Using GeoGebra, students explore how changing data points affects the shape of CF graphs

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An example of a cumulative frequency graph and a box plot for a set of data. For the quartiles, drag the point on the curve to place them appropriat...

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Students work individually on differentiated worksheets:
Foundation: Creating CF tables
Intermediate: Drawing CF graphs
Extension: Finding quartiles and IQR

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Compare and analyze CF graphs from different datasets to identify trends and patterns

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Throughout the lesson:
- Observe student discussions
- Check CF tables for accuracy
- Review graph construction technique

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Students complete a short digital quiz on identifying median and quartiles from CF graphs. Results can be shared instantly on a class Padlet.

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Students swap graphs and check each other's work using success criteria checklist

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What are the advantages of using cumulative frequency graphs over other types of graphs?

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Students complete 3-2-1:
3 things learned
2 things interesting
1 question remaining

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Complete the worksheet on CF graphs using real-world data about rainfall amounts

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Collect data about daily screen time over a week and create a CF graph. Analyze the median and quartiles.

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Complete interactive exercises on Corbettmaths website

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The Corbettmaths Practice Questions on Cumulative Frequency Graphs