Cumulative Frequency — Interactive Lesson (Ages 14–16)

☆☆☆☆☆ Add your review • Year 10–11 • 🎓 Interactive Lesson & Activities

A 19-slide interactive KS4 lesson on cumulative frequency: completing tables, drawing cumulative frequency graphs and estimating the median.

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Do your students plot the wrong values on a cumulative frequency graph? This 19-slide interactive lesson teaches cumulative frequency from the table to the curve.

Mastering Cumulative Frequency at GCSE

Students learn to calculate and complete a cumulative frequency table by adding each frequency to the running total, checking that the final value equals the total frequency. They then construct the graph by plotting the upper boundary of each class interval against its cumulative frequency, joining the points with a smooth curve, and use the graph to find an estimate of the median. Worked examples use data such as students’ heights and hours worked.

What’s Included

19-slide interactive lesson on cumulative frequency
Learning objectives: complete the table, construct and interpret the graph, estimate the median
Worked examples with class intervals such as 100 < h ≤ 110
Step-by-step running totals with a built-in check
Self-marking questions with instant feedback

Key Benefits for Students

Makes running totals and upper boundaries clear
Shows why a smooth curve gives a more accurate graph
Links the graph to estimating the median
Instant feedback on answer questions

Why Teachers Love It

No prep — ready for whole-class teaching on an interactive whiteboard
Worked examples model each stage of the method
Self-marking questions support independent practice
Suits teaching, revision and homework
A useful lesson to return to before statistics exams

Love this? You’ll love…

A dependable addition to a GCSE statistics topic, giving students a clear method for a graph type that often costs marks. Confidence here also supports work on box plots and comparing distributions.

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FAQ

What year group is this for? Years 10–11 (ages 14–16), GCSE.

Does it cover estimating the median? Yes — students use the graph to estimate the median.

Is it self-marking? Yes, with instant feedback on the questions.

Year Groups	Year 10–11
Resource Type	🎓 Interactive Lesson & Activities
Format	Digital Only
Curriculum	England & Wales — KS4 (Years 10–11)
Added	4 March 2026