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.
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
Helpful first
What can come next
Useful contrasts
Use contrasts after the main pattern is secure. They help children see where a useful phonics generalisation stops applying.
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.
Related Tiny Steps resources
Keep the pattern inside the bigger reading pathway
Need help finding the actual gap?
Use an assessment when practice alone is not showing what is stuck.
The focused guide explains one pattern. A broader assessment can separate sound knowledge, blending, decoding, spelling and fluency needs.