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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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Fractions on a number line

Mathematics · Measurement · procedural

Solve word problems involving distances, time intervals, liquid volumes, masses, and money using the four operations with fractions or decimals; represent with diagrams including number lines

What mastery looks like

  • A 2.5 kg bag of flour is split equally into 4 portions — what does each weigh?
  • A journey takes 1 hr 45 min; what time do you arrive if you leave at 09:20?
  • Three ribbons of 0.75 m, 1.2 m, and 0.95 m — what is the total length?

Check your understanding

If Fractions on a number line is planning a 4.5 km walk and has already walked 1.75 km, can they work out how far is left — and estimate how long the remaining walk might take?