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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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Spelling Verb Endings

English · Spelling & Word Study · procedural

Spell words with common suffixes (-s/-es for plurals and third person verbs, -ing, -ed, -er, -est) where no change to the root word is needed

What mastery looks like

  • Add -s or -es correctly to make plurals (e.g. 'cats', 'boxes')
  • Spell words with -ing and -ed endings (e.g. 'jumping', 'helped')
  • Add -er and -est to adjectives (e.g. 'quicker', 'quickest')

Check your understanding

When Spelling Verb Endings writes about more than one dog or talks about something that is happening now, do they add the right ending — like "dogs" or "jumping" — without making spelling mistakes?