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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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Word Parts as Clues

English · Vocabulary · conceptual

Use knowledge of common inflections and affixes (-ed, -s, un-, -er) as clues to the meaning of unknown words; understand how the prefix un- changes meaning

What mastery looks like

  • Recognise that -ed signals past tense (e.g. 'jumped' = already happened)
  • Explain how un- makes a word mean the opposite (e.g. 'unhappy' = not happy)
  • Use word parts to figure out the meaning of an unfamiliar word

Check your understanding

If Word Parts as Clues sees an unfamiliar word like "unhelpful" or "jumped," can they use the beginning or ending of the word to work out what it means?