🔢 Mathematics · Probability
The Probability Scale
Understand probability as a measure on a scale from 0 (impossible) to 1 (certain); use the language of probability including likely, unlikely, certain, and impossible
Typical age: 11–13 years
“Can your child explain that probability goes from 0 (impossible) to 1 (certain), place events on that scale as numbers, and tell you whether a game is fair or not?”
0 / 3 mastered
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Needs first
- One Quantity as a Fraction
Probability as a fraction requires expressing one quantity as a fraction of another
- Calculating Simple ProbabilityREQUIRED
The formal KS3 treatment of probability as a 0-1 scale with fairness and equally-likely outcomes formalises what was practised in the age-10-11 calculation node