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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 Known Sounds

English · Phonics & Word Reading · procedural

Recognise alternative grapheme-phoneme correspondences for known phonemes (e.g., /dʒ/ as ge/dge/g, /s/ as c, /n/ as kn/gn, /r/ as wr, /ʒ/ as s), reading words with less common spellings for familiar sounds

What mastery looks like

  • Read words with less common spellings for familiar sounds: 'badge', 'giraffe', 'city', 'knock', 'gnaw', 'write', 'treasure'
  • Identify that the same phoneme can be represented by different graphemes (e.g., /dʒ/ spelled g, ge, dge)
  • Select the correct alternative GPC to decode an unfamiliar word in context

Check your understanding

Does Alternative Spellings for Known Sounds know that the /j/ sound can be spelled different ways — like in 'jump', 'cage', and 'bridge' — and can they read words with these less common spellings?