This stage doesn't add new sounds — it's where the sounds from Stages 1–2 get put to work. Blending is pushing individual sounds together smoothly ("c-a-t" → "cat") to read; segmenting is the reverse, pulling a spoken word apart into its sounds ("cat" → /c/ /a/ /t/) to spell. Almost all practice happens on CVC (consonant-vowel-consonant) words — cat, dog, pin, sun — because they're the shortest words with a fully decodable, no-exceptions structure.
Why this stage matters
This is the hinge of the entire roadmap. A child who can name every letter sound but can't blend them still can't read independently — and a child who struggles here will keep struggling at every later stage, because digraphs and vowel teams are blended exactly the same way, just with more sounds. Most "my child knows the sounds but can't read" cases trace back to blending, not sound knowledge.
How long it usually takes
4–10 weeks — the widest range in the roadmap, because blending speed (not sound knowledge) is what varies most between children at this age.
The most common struggle
Saying each sound correctly in isolation but not being able to push them together into a word — usually a rate problem (sounds said too slowly/separately), not a knowledge problem. Faster, more clipped sounding-out fixes it for most kids. Read more →