Introduction to the Probability Scale — Interactive Lesson & Worksheet (Year 7)

How likely is it to rain tomorrow? This 29-slide interactive lesson introduces the probability scale, from impossible to certain.

An Introduction to the Probability Scale for Year 7 Maths

Students learn that probability measures how likely an event is, and place events on a probability scale using the words impossible, unlikely, even chance, likely and certain. They link the scale to percentages: impossible is 0%, an even chance is 50% and certain is 100%. Drag-and-drop questions cover everyday events, and students mark a cross on a scale for a fair four-sided spinner.

What’s Included

• 29-slide interactive lesson on the probability scale
• The vocabulary of impossible, unlikely, even chance, likely and certain
• Linking the scale to 0%, 50% and 100%
• Drag-and-drop and spinner questions with instant feedback
• A printable worksheet with an answer page

Key Benefits for Students

• Builds the language of chance
• Links words, numbers and percentages on one scale
• Uses familiar events, coins and spinners
• Instant feedback on answer questions

Why Teachers Love It

• No prep — ready for whole-class teaching on an interactive whiteboard
• The worksheet provides ready-made practice with answers
• Self-marking questions support independent practice
• Suits teaching, revision and homework
• A natural first lesson in a probability unit

Love this? You’ll love…

• Probability of Two Events — Interactive Lesson & Worksheet (Ages 11–14)
• Sample Space Diagrams — Interactive Lesson (Ages 11–14)
• Finding The Range | Measures Of Dispersion — Interactive Lesson (Year 7)

A dependable start to a probability unit, giving Year 7 students the vocabulary and the number line they need before calculating probabilities. A confident grasp of the scale supports sample spaces and combined events.

Start probability with confidence — Add to Basket.

FAQ

What year group is this for? Year 7 (ages 11–12), KS3.

Is a worksheet included? Yes — a printable worksheet with an answer page.

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