Focused phonics guideWord structure

Why can the ending sound /shun/ be spelled in different ways?

Quick answer

The /shun/ ending appears in several spelling families, including common endings such as -tion and -sion. Children should learn these as word-ending patterns linked to vocabulary and morphology, not as a one-to-one rule.

Pattern to notice

SHUN sound family

Target endings commonly /ʃən/; vision has /ʒən/ and belongs in a later contrast set.

tionsion

Where this fits in the phonics journey

Advanced phonics patterns

This concept belongs after core digraphs, vowel patterns and early decoding are reasonably secure. The prerequisite and next-step links on this page show the surrounding learning sequence.

What the child should be able to do

Recognise common /shun/ word endings and connect their spelling to whole words, vocabulary and meaningful word parts.

When this pattern does not apply

Do not force one spelling onto every /shun/ ending. Some related endings also have different pronunciations, such as /zhun/ in vision.

Reading use

Read endings such as -tion and -sion as familiar word-ending patterns inside complete words.

Spelling use

Learn spelling by word family and morphology because the /shun/ sound alone does not determine the correct ending.

Tiny Steps curriculum connection

Direct lesson alignment

  • Early PhonicsLesson 39: The SHUN Family
  • Advanced PhonicsLesson 20: The SHUN Sound Family

How to teach this pattern

  • Introduce one high-frequency ending family at a time in complete words.
  • Use morphology and vocabulary because spelling choice is not determined by sound alone.

Common confusions to watch for

  • Trying to spell every /shun/ ending with one fixed grapheme.
  • Teaching the ending only as a sound without connecting it to whole words and meaningful parts.

Simple practice ideas

  • Sort familiar words by -tion and -sion endings.
  • Highlight the base or meaningful part before reading the ending.

Learning sequence

Useful contrasts

Use contrasts after the main pattern is secure. They help children see where a useful phonics generalisation stops applying.

vision

Explore related phonics patterns

More from word structure

These links are selected from the published Tiny Steps phonics graph, prioritising nearby patterns in the same family before adjacent curriculum concepts.

Browse all phonics resources →
Schwa / lazy vowelIn many unstressed syllables, a vowel can reduce toward schwa, a weak neutral vowel sound. This helps explain why spelling cannot always be recovered from careful pronunciation alone in longer words.Consonant-LE / Monster LEIn many words, a final consonant plus le forms a stable final syllable, as in table, little and purple. Recognising the chunk also prevents children from applying the Magic E explanation to every final-e word.Rabbit RuleTiny Steps uses the Rabbit Rule for the common two-syllable pattern where a consonant is doubled between vowels, helping keep the first vowel short, as in rabbit. It is a useful syllable-and-spelling pattern, not a rule for every two-syllable word.J sound: J, G and DGEThe /j/ sound can be represented by several spellings, including j, soft g and dge in different contexts. Reading the sound is only part of the job; spelling requires learning the pattern and position.

Related Tiny Steps resources

Keep the pattern inside the bigger reading pathway

Back to Phonics & Reading →
Read the related guide/blog/phonics-multisyllabicUse focused practice/free-reading-games-for-kids

Your next learning step

Continue with the learning path that matches this need

If this is the same need you see in your child, the relevant programme is the most useful next step.

Explore the Tiny Steps phonics programme