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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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Computing
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Telling time to the minute (age 9+)

Mathematics · Measurement · procedural

Solve problems involving converting between units of time (hours↔minutes, minutes↔seconds, years↔months, weeks↔days)

What mastery looks like

  • Convert 3 hours 25 minutes to 205 minutes
  • A programme lasts 150 seconds — express in minutes and seconds
  • How many days are in 8 weeks and 3 days?

Check your understanding

If Telling time to the minute (age 9+) needs to convert 2 hours 35 minutes into just minutes, can they do it — and then convert 180 seconds into minutes and seconds?