Finding The Range | Measures Of Dispersion — Interactive Lesson (Year 7)

The range gives the fastest possible answer to “how spread out is this data?” This finding the range lesson, built as a 14-slide interactive lesson, gives KS3 students focused practice on this measure of dispersion.

Students find the range of a data set by subtracting the smallest value from the largest, and use it to compare the spread of different data sets, with instant self-marking feedback throughout.

Mastering Finding The Range in KS3 Maths

This resource covers the KS3 National Curriculum area of statistics, calculating the range as a measure of dispersion and using it to compare data sets.

What’s Included

• 14-slide fully interactive digital lesson
• Range-calculation activities across different data sets
• Self-marking data-comparison questions

Key Benefits for Students

• Builds genuine understanding of spread, not just a formula
• Concise, focused lesson keeps the concept clear
• Instant feedback keeps pupils engaged

Why Teachers Love It

• No prep, self-marking
• Directly supports the KS3 statistics curriculum
• Concise lesson fits a single class period

Real-World Uses

Finding the range is exactly how a weather forecaster describes a temperature swing, or how a sports analyst compares how consistent two players’ scores are match to match — a quick, genuinely useful statistic outside the classroom too.

Love this? You’ll love…

• Dealing With Money — Interactive Lesson (Year 7)
• Calculating Averages — Interactive Lesson (KS3)
• Probability Of A Single Event — Interactive Lesson (Year 7–8)

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