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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 100

Mathematics · Number Representation & Place Value · language

Read and write numbers to at least 100 in words

What mastery looks like

  • Read 'fifty-seven' and write the numeral 57
  • Write 'eighty-three' when shown the numeral 83
  • Read and write all decade words (twenty, thirty … ninety) correctly

Check your understanding

Can Number Words to 100 write 'seventy-four' or 'one hundred and three' as number words — and read them correctly when they appear in a book or on a sign?