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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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Agreement in sentences

English · Grammar & Punctuation · procedural

Ensure subject-verb agreement and pronoun-antecedent agreement within and across sentences

What mastery looks like

  • Correct 'The group of children were laughing' to 'The group of children was laughing' and explain the singular subject
  • Choose the correct pronoun in 'Each student must bring ____ (his or her / their) book' and explain the antecedent link
  • Identify and fix three agreement errors in a short paragraph, explaining each correction

Check your understanding

If Agreement in sentences writes "Each of the players have their own locker", can they spot the error and fix it to "has their own locker" — making sure the verb matches the subject?

Prerequisites

Required first

Unlocks (0 directly)

None.