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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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Comparing durations

Mathematics · Measurement · language

Use comparative language for time: quicker, slower, earlier, later

What mastery looks like

  • Compare two events and say which was quicker/slower
  • Use 'earlier' and 'later' correctly to describe daily events
  • Solve practical problems like 'Who finished first?'

Check your understanding

If Comparing durations finishes their dinner before a sibling, can they tell you who finished earlier — and which one was quicker?

Prerequisites

None — this is a foundational concept.

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