Digraphs: When Two Letters Make Just One Sound

After mastering single letter sounds, a new reader hits an odd case: "sh" in "ship" isn’t the /s/ sound followed by the /h/ sound — it’s one single sound, /sh/, that just happens to be written with two letters. Letter pairs like this — sh, ch, th, wh, ph, ng — are called digraphs, and recognizing them as a unit is one of the most important upgrades to a young reader’s toolkit.

The confusion digraphs cause is predictable: someone used to "sound out every letter" will try to blend /s/ + /h/ separately in "ship" and get stuck, because that combination doesn’t actually exist as a blended sound in English. The fix isn’t more blending practice — it’s learning that "sh" specifically should be treated as one chunk, not two separate letters to sound out.

Each digraph — sh, ch, th, wh, ph, ng — needs to be explicitly introduced as its own single sound, ideally with its own memorable cue, so a reader stops trying to split it apart.

A good way to reinforce this: when reading together and hitting a digraph, cover the second letter with a finger briefly and ask "is this one sound or two?" — helping someone consciously notice that sh, ch, and th behave differently from ordinary two-letter combinations like "st" or "cl," which really are two separate sounds blended together.