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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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Number Words to Twenty

Mathematics · Number Representation & Place Value · language

Read and write number words from one to twenty

What mastery looks like

  • Read the word 'twelve' and identify it as 12
  • Write the word form of a given number 1–20
  • Match numeral cards to number word cards

Check your understanding

Can Number Words to Twenty write number words like 'fourteen' or 'twenty' — and read them on a birthday card or in a story book without needing help?