Complete Year 9 KS3 maths lesson on sampling and data collection: slides, 3-level worksheets, hands-on experiment, case files and full answers.

Students explore random, systematic, stratified and convenience sampling, calculate stratified samples, spot bias and judge whether a survey is representative. A 60-minute lesson that works with the whole class, in teams or for revision.

What’s included

• 13-slide PowerPoint with worked examples (answers appear on click)
• 60-minute lesson plan with hinge questions and common misconceptions
• Three differentiated worksheets (Support, Core, Challenge) with marks
• Survey Detectives activity: a Word-Length Experiment plus case files on biased surveys
• Starter, exit ticket, homework, key terms and self-assessment sheet
• Full teacher answers with working
• 11 editable files (Word and PowerPoint) + a combined PDF of the worksheets

Also free: Solving Equations Escape Room and Interior Angles of Polygons.

If this lesson helps your class, a quick review makes a big difference to a new shop. Thank you!