How to Teach Blends and Digraphs (bl, sh, ch, th)
Your child can read "cat" and "dog" with confidence. Now they encounter a word like "stop" or "ship" — and suddenly there are extra consonants that do not follow the simple CVC pattern they know. This is where blends and digraphs enter the picture.
These two concepts are often lumped together, but they work very differently. Understanding the difference — and teaching them in the right order — makes a significant impact on your child's decoding progress.
Blends vs. Digraphs: The Key Difference
A blend is two or three consonants next to each other where you can still hear each individual sound. In "stop," you hear /s/ and /t/ separately before the vowel. In "frog," you hear /f/ and /r/. The sounds blend together but remain distinct.
A digraph is two consonants that combine to make one entirely new sound. In "ship," the S and H do not make /s/ and /h/ — they make /sh/, a sound that neither letter makes on its own. In "chip," C and H become /ch/. In "thin," T and H become /th/.
The simplest way to explain this to your child: "In a blend, you can hear both sounds. In a digraph, the two letters make a brand new sound."
Key Insight: Blends keep their individual sounds — you can hear both letters. Digraphs create a new sound entirely. Teaching your child this distinction prevents the common mistake of trying to sound out "sh" as /s/ /h/.
Which to Teach First
Teach digraphs before blends. This may seem counterintuitive — blends feel simpler because each letter keeps its own sound. But digraphs are actually easier for children to learn because:
- There are only a handful of common digraphs (sh, ch, th, wh, ck), so the learning load is small.
- Each digraph makes one consistent sound, which is simple to memorize.
- Children encounter digraph words constantly — "the," "this," "she," "when," "much" — so the practice opportunities are everywhere.
Start with these four digraphs in this order:
- sh — ship, shop, shell, shut, fish, wish, mash
- ch — chip, chop, chin, much, rich, such, lunch
- th — this, that, them, then, thin, thick, bath, math (note: th has two sounds — voiced as in "this" and unvoiced as in "thin." Introduce both but do not belabor the distinction early on.)
- wh — when, what, where, which, while, white, whale
How to Teach Digraphs
Step 1: Introduce the new sound. Write "sh" on a card. Say: "When S and H are together, they do not say /s/ and /h/ anymore. They make a new sound: /sh/." Have your child say /sh/ several times.
Step 2: Read words with the digraph. Start with the digraph at the beginning of words: ship, shop, shin, shed, shut. Then practice words with the digraph at the end: fish, dish, wish, mash, rush.
Step 3: Contrast with CVC words. Mix digraph words with regular CVC words so your child practices recognizing when a digraph is present: "Read these — cat, ship, bed, chin, dog, fish."
Step 4: Write words with the digraph. Dictate words and have your child spell them. When they hear /sh/ at the beginning of "shop," they need to write both letters. This reinforces that the digraph is a unit.
How to Teach Blends
Once digraphs are solid, move to consonant blends. There are many more blends than digraphs, so organize them into categories:
L-blends: bl, cl, fl, gl, pl, sl — block, clap, flag, glad, plan, slid R-blends: br, cr, dr, fr, gr, pr, tr — brat, crab, drip, frog, grip, prop, trip S-blends: sc, sk, sm, sn, sp, st, sw — scat, skip, smog, snap, spot, stop, swim
Teach one category at a time. L-blends and S-blends are generally easier than R-blends because the tongue position for /r/ is more difficult.
Key Insight: Organize blends into families — L-blends, R-blends, and S-blends — rather than teaching them randomly. This structure helps children see patterns and reduces the feeling of being overwhelmed by dozens of new letter combinations.
The Blending Strategy for Blends
The trick with blends is that children need to say the consonant sounds quickly, one after the other, before adding the vowel. Model this clearly:
For "stop": "/s/... /t/... /o/... /p/" — then faster: "/st/... /op/" — then blended: "stop."
For "frog": "/f/... /r/... /o/... /g/" — then: "/fr/... /og/" — then: "frog."
Some children find it helpful to "slide" through the blend rather than saying each consonant separately. Instead of "/s/ then /t/," they say "/sssst/" with a smooth connection. This is perfectly fine and often easier.
Hands-On Practice Activities
- Blend and digraph cards: Write blends and digraphs on individual cards. Place them in front of word endings (-ip, -op, -ed, -in, -ug). Your child places different blend/digraph cards in front of each ending to build words: sh + ip = ship, ch + ip = chip, tr + ip = trip.
- Sound boxes with extra slots: For CVC words, your child used three sound boxes. For blends and digraphs, add a fourth box. For "stop," the boxes hold: s-t-o-p. For "ship," the boxes hold: sh-i-p (the digraph shares one box because it is one sound).
- Digraph highlighters: Give your child a text with several digraph words. Have them highlight every digraph they find. This trains the eye to spot digraphs as units rather than individual letters.
- Blend ladders: Write a blend at the top of a column (like "st-") and have your child build as many words as they can by adding different endings: stop, step, stem, stun, stuck, still, stiff.
Common Mistakes to Avoid
Treating digraphs like blends. If your child tries to sound out "ship" as "/s/ /h/ /i/ /p/," they will get a garbled result. Reinforce that sh is one sound, not two.
Skipping ending blends. Most instruction focuses on beginning blends (the "st" in "stop"), but ending blends are equally important — the "nd" in "hand," the "mp" in "jump," the "nk" in "think." Teach both positions.
Moving too fast. There are dozens of blends in English. Do not try to teach them all at once. Focus on one family per week, review constantly, and let your child build automaticity before adding new combinations.
Forgetting to review CVC words. When you introduce blends and digraphs, keep CVC words in the mix. Your child needs to read simple and complex words together, deciding in real-time whether a word contains a blend, a digraph, or neither.
Three-Consonant Blends
After your child is comfortable with two-consonant blends, introduce three-consonant blends:
- str: string, strong, street, strip
- spr: spring, spray, spread
- spl: splash, split, splint
- scr: scream, scrub, scratch
These follow the same principle — each consonant keeps its own sound — but they require more working memory to hold three sounds before the vowel. Practice with patience.
Key Insight: Three-consonant blends like "str" and "spr" are not new concepts — they are the same blending skill your child already has, just with one more sound to hold in memory. If they can do two-consonant blends, they can learn three-consonant blends with practice.
Blends and digraphs open up a huge portion of English words to your child. With just the basic CVC pattern plus a handful of blends and digraphs, your child can decode hundreds of real words. Teach digraphs as single units, teach blends in organized families, and keep reviewing everything together. The payoff is enormous.
If you want a system that handles this progression automatically — introducing digraphs and blends in the right sequence, providing targeted decoding practice, and building fluency as your child masters each pattern — that is exactly what Lumastery is built for.