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Education Concept Tracker

A prerequisite knowledge graph of 1590 learning concepts across 8subjects. Track what you've mastered and see exactly what you're ready to learn next — the topics whose prerequisites you've already met. Built on the Marble Open Skill Taxonomy.

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The Probability Scale

Mathematics · Probability · conceptual

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

What mastery looks like

  • 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)

Check your understanding

Can The Probability Scale 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?