What Are Digraphs? A Parent’s Guide to Teaching th, sh, and ch

What Are Digraphs

A digraph is a pair of written letters that join together to represent a single, unique speech sound (phoneme), such as the /sh/ in ship or the /ch/ in chip. Unlike consonant blends where each letter retains its individual sound, digraphs merge completely to make a brand-new sound.

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Digraph Primary Sound(s) Mouth & Tongue Position Example Words (Start / End) Simple Home Activity
TH

/θ/ (unvoiced)

 

/ð/ (voiced)

Tongue lightly between teeth

thin, thumb / path, math

 

this, that / with, smooth

Mirror Check: Have your child check if their tongue sticks out between their teeth in a mirror.
SH /ʃ/ Lips rounded, teeth close together ship, shop / fish, brush Shh Gesture: Put a finger to your lips to make the quiet “shhh” sound together.
CH /tʃ/ Tongue taps the roof of the mouth chair, chip / bench, couch Train Motion: Move arms like train wheels while making a “choo-choo” sound.

10 Steps to Teach “th,” “sh,” and “ch” Digraphs at Home

1. Explicitly Teach the “Two Letters, One Sound” Rule

Explain to your child that when “h” stands next to “c,” “s,” or “t,” they form a secret team that makes one brand-new sound. Building this foundational phonemic awareness early ensures children stop trying to pronounce both letters individually.

2. Focus on Mouth Mechanics and Tactile Cues

Young readers rely heavily on physical sensation. Show your child how their lips, tongue, and airflow change when switching between digraphs:

  • TH: Tongue touches front teeth.

  • SH: Lips push forward into a circle.

  • CH: Air bursts quickly out of the mouth.

3. Teach the Unvoiced and Voiced “TH” Distinctions

The “th” digraph makes two distinct sounds:

  • Unvoiced /θ/: Air blows softly without vocal cord vibration (thumb, think).

  • Voiced /ð/: Vocal cords vibrate (this, them, father). Have your child place two fingers on their throat to feel the vibration during voiced words.

4. Master the Soft “SH” Sound with Visual Aids

Pair the /sh/ sound with familiar visual clues. Draw or show pictures of a ship, shell, or shoe to help visual learners connect the letters sh directly to the sound.

5. Practice the Explosive “CH” Sound

Contrasting /sh/ (a continuous sound you can hold) with /ch/ (a quick, stopping sound) prevents confusion. Use rhythmic chants or train sounds (“ch-ch-ch-choo-choo”) to reinforce the sudden burst of the /ch/ sound.

Infographic explaining TH SH and CH digraphs, mouth positions, example words, sound cues, and a simple home practice routine for young readers.
A visual guide to teaching TH, SH, and CH digraphs with sound formation tips, word examples, and an easy four step practice routine.

6. Use Color-Coded Letter Tiles

When building words with magnetic letters or paper tiles, keep digraph letters on a single tile or use a distinct color for the h combinations. This visually reinforces that sh, ch, and th function as a single unit.

7. Differentiate Between Digraphs and Consonant Blends

Clarify the difference between blends and digraphs:

  • Consonant Blend (e.g., st in stop): You hear both /s/ and /t/.

  • Consonant Digraph (e.g., sh in shop): You hear one new sound /sh/.

8. Practice Digraphs at the Beginning and End of Words

Children often master initial digraphs first before struggling with final digraphs. Practice word pairs systematically:

  • CH: chip vs. much

  • SH: shop vs. fish

  • TH: thin vs. bath

9. Play “Digraph Sound Hunts” Around the House

Give your child a magnifying glass or marker and hunt for household items containing target digraphs (e.g., chair, shelf, thermos, brush, matchbox).

10. Read Decodable Books and Underline Digraph Teams

Use simple decodable books containing CVC (Consonant-Vowel-Consonant) words and digraphs. Have your child underline every ch, sh, and th team before reading the sentence aloud. This exercise strengthens core decoding skills as children transition to full sentence reading.

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Frequently Asked Questions (FAQs) About What Are Digraphs

What is the difference between a digraph and a diphthong?

A consonant digraph consists of two letters making one consonant sound (like sh or ch). A diphthong is a glide between two vowel sounds in a single syllable (like oi in boil or ou in cloud).

At what age should children learn consonant digraphs?

Consonant digraphs are typically introduced in Kindergarten or early 1st Grade, right after children master individual single-letter consonant and short-vowel sounds.

What are the most common consonant digraphs in English?

The primary consonant digraphs taught first are sh, ch, th, wh, and ck.


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