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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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Alternative Spellings for Sounds

English · Spelling & Word Study · procedural

Spell words using alternative grapheme choices for known phonemes, learning new spellings for sounds already encountered (e.g., /ɔ:/ as 'a' before ll, /ʌ/ as 'o', words ending -tion), including distinguishing common homophones

What mastery looks like

  • Spell 'ball', 'call', 'walk' using alternative grapheme /ɔ:/ as 'a' before ll
  • Distinguish homophones in writing: 'there/their/they’re', 'here/hear', 'quite/quiet'
  • Spell words ending in -tion correctly: 'station', 'fiction', 'motion'

Check your understanding

When Alternative Spellings for Sounds writes and comes across a word where the same sound can be spelled different ways — like "see" and "sea" — do they know which spelling to use?