Mathematics Probabilityusually ages 11–13

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

How to tell they’ve got it

Tick these off as you see them — no test required.

Place everyday events on a 0-to-1 probability scale with justification
Explain why a fair six-sided die gives each number a probability of 1/6
Distinguish between equally likely outcomes (fair coin) and unequally likely outcomes (biased spinner)

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Try this together

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?

Where this sits on the map

Stuck here? Check the skills it builds on first. Confident? Here’s what it unlocks.

Builds on

Calculating Simple Probabilityages 10–11The 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

One Quantity as a Fractionages 11–12Probability as a fraction requires expressing one quantity as a fraction of another

The Probability Scalethis skill · ages 11–13

Unlocks

Complementary eventsages 11–13Probabilities summing to 1 builds directly on understanding the probability scale

Experimental probabilityages 11–13Experimental probability requires understanding the 0–1 probability scale first

solid = must come firstdashed = helps

Curriculum alignment

Candidate matches to official curriculum codes — machine-suggested, unreviewed (v0.1).

Show candidate curriculum codes · 2 ACARA · 2 VIC

Australian Curriculum v9 candidate

AC9M6P01medium confidenceYear 6 · Probability

recognise that probabilities lie on numerical scales of 0 – 1 or 0% – 100% and use estimation to assign probabilities that events occur in a given context, using common fractions, percentages and decimals

AC9M5P02low confidenceYear 5 · Probability

conduct repeated chance experiments including those with and without equally likely outcomes, observe and record the results ; use frequency to compare outcomes and estimate their likelihoods

Victorian Curriculum 2.0 codes & levels only

VC2M6P01low confidenceMathematics · Level 6 · Probability strand

VC2M5P01low confidenceMathematics · Level 5 · Probability strand

These are candidate alignments generated by semantic matching — machine-suggested and unreviewed (v0.1), not official or verified mappings. For official curriculum content see australiancurriculum.edu.au, curriculum.nsw.edu.au and f10.vcaa.vic.edu.au. Don’t rely on them for registration or compliance purposes.

Nearby on the map

Complementary eventsages 11–13 Experimental probabilityages 11–13 Calculating Simple Probabilityages 10–11 Experimental vs Theoreticalages 10–11

All Probability skills →