Consonant blends: bl, cl, st, tr, sp
Two consonants side by side where you still hear each sound, and how to blend, read and spell the words that use them
About four short lessons of 20 to 30 minutes
Two sounds that hold hands but keep their own voice
You already know that some letters team up to make one brand new sound, like s and h making /sh/ in ship. But other letters do something different. When s and t stand side by side in stop, they hold hands, yet each one keeps its own voice. You can still hear the /s/ and then the /t/, said quickly one after the other.
Two sounds that hold hands but keep their own voice. That is a blend. Today you will meet five of these letter teams, bl, cl, st, tr and sp, and learn to read and spell the everyday words that use them.
- blockb and l hold hands: you still hear /b/ then /l/
- clapc and l blend: /c/ then /l/, both heard
- stars and t blend: /s/ then /t/, both heard
- treet and r blend: /t/ then /r/, both heard
- spins and p blend: /s/ then /p/, both heard
What students will be able to do
Students will understand that a consonant blend is two consonants side by side where each sound is still heard, will read words that begin with bl, cl, st, tr and sp, will blend all the sounds in words like stop, flag and tree, will spell blend words by writing a letter for each sound, and will tell a blend (two sounds) apart from a digraph (one new sound).
- I can hear that a blend like st is two sounds, /s/ and /t/, said quickly together.
- I can read words that begin with bl, cl, st, tr and sp.
- I can blend all the sounds in a word like stop, flag and tree to read it.
- I can spell blend words by writing a letter for each sound I hear.
- I can tell a blend (two sounds) apart from a digraph (one new sound).
Standards this unit teaches
- RF.1.2.bCommon Core (US)Blend sounds including consonant blends
Orally produce single-syllable words by blending sounds (phonemes), including consonant blends.
- RF.1.2.dCommon Core (US)Segment single-syllable words into sounds
Segment spoken single-syllable words into their complete sequence of individual sounds (phonemes).
- RF.1.3.bCommon Core (US)Decode regularly spelled one-syllable words
Decode regularly spelled one-syllable words.
- AC9E1LY10Australian Curriculum v9 (ACARA)Phonic knowledge and blending to read words
Use phonic knowledge of common and split digraphs, blends and vowel and consonant graphs when reading one-syllable and two-syllable words, and blend sounds to read words.
Prior knowledge
This unit builds on skills students should already have met. Revisit any that are shaky first.
- Short and long vowel sortingthe vowel sounds children blend between the consonants must be secure first
- Using decodable readerschildren should already blend simple CVC words like top and pin before adding a blend
- Sight wordsthe heart words (the, was, said) that cannot be sounded out yet, learned alongside decoding
Words to teach and display
- Consonant blend
- two consonants side by side where you still hear each sound, like st in stop
- Digraph
- two letters that together spell one new sound, like sh in ship, not two sounds
- Phoneme
- the smallest single sound in a word; stop has four, /s/ /t/ /o/ /p/
- Grapheme
- the letter or letters that spell one sound; in a blend each sound has its own letter
- Blending
- pushing sounds together in order to read a whole word
- Segmenting
- breaking a word into its separate sounds, the move you use to spell it
Teach it: model, guided practice, independent
The lesson moves from hearing the two sounds, to blending them inside words, to reading and spelling those words. Every example is a real word a child can sound out, so the phonics is practised on words rather than learned as a rule. Say each sound clearly and have children echo it before they read.
1. A blend is two sounds you still hear
Start with the big idea and a friendly picture: some letters hold hands but keep their own voice. On their own, s says /s/ and t says /t/. When they stand together in stop, they still say /s/ then /t/, just quickly one after the other. Two sounds you can still hear. That team of two letters is a consonant blend.
Say it and feel it. Have children say /st/ slowly and notice they hear two sounds, /s/ then /t/, not one new sound. Do the same for /bl/, /cl/, /tr/ and /sp/.
Anchor the count: the word stop has four letters and four sounds, /s/ /t/ /o/ /p/, because each letter is its own sound. This is the idea the whole unit rests on, and it is exactly what makes a blend different from a digraph.
- How many sounds do you hear at the start of stop?
- When you say /st/, do you hear one new sound or two sounds?
- How many sounds are in stop? How many letters?
2. Meet the initial blends
Introduce the five blends one at a time, each with a keyword and a short set of example words. Say the two sounds, say the keyword, then read the words together, pointing under each word as the class blends it. Keep the words to ones children can fully sound out.
bl says /b/ /l/ as in block. More words: blue, black, blob, blot, blip.
cl says /c/ /l/ as in clap. More words: club, clip, clop, clam, clog.
st says /s/ /t/ as in stop. More words: star, step, stem, stick, stuck.
tr says /t/ /r/ as in tree. More words: trip, trap, truck, track, trot.
sp says /s/ /p/ as in spin. More words: spot, spill, spell, spun, spit.
- Which two sounds do you hear at the start of clap?
- Say two more words that begin with st.
- What are the two blend sounds at the start of tree?
3. Blending blend words
Now blend whole words. Because a blend is two sounds, the child says both blend sounds in the sequence, then the vowel and the last sound, and pushes them all together. Model it slowly, then speed it up until the word pops out. The most common slip is squashing the two blend sounds into one, so keep them separate.
Point under each sound as you blend. In a blend word there is one push for each letter of the blend, not one push for both. Say the sounds quickly so they hold hands, but keep both.
Blend these three words, saying every sound.
- stop: /s/ ... /t/ ... /o/ ... /p/, then push them together, stop.
- flag: /f/ ... /l/ ... /a/ ... /g/, then push them together, flag.
- tree: /t/ ... /r/ ... /ee/, then push them together, tree.
Answer: stop, flag, tree. Each begins with a blend, so you say both blend sounds, not one, and then finish the word.
- How many sounds did you push together to read stop?
- What two sounds do you hear at the start of tree?
4. Reading and spelling blend words
Reading and spelling are two directions of the same skill. To read, you blend the sounds into a word. To spell, you segment the word into its sounds and write a letter for each one. The key move for blend words is that you hear both blend sounds, so you write both letters.
Segment out loud before writing. Stretch the word, count the sounds on your fingers, then write a letter for each sound. Because a blend is two sounds, both consonants get written. Missing one changes the word.
Spell the word clap by breaking it into sounds.
- Stretch and count the sounds: /c/ ... /l/ ... /a/ ... /p/. That is four sounds.
- Write a letter for each sound: c, then l, then a, then p.
- Because you hear both /c/ and /l/ at the start, you write both letters. No sound is hidden.
Answer: clap. Four sounds, /c/ /l/ /a/ /p/, and four letters, one for each sound.
- How many sounds are in clap? How many letters?
- Why do you write two letters at the start of clap and not one?
5. Blend or digraph?
Close by clearing up the mix-up these teams cause with digraphs. In a blend like st, you still hear both sounds, /s/ and /t/. In a digraph like sh, the two letters make one brand new sound and you do not hear /s/ then /h/. They look alike on the page, so sort a few by ear.
Blend or digraph: stop (blend st, two sounds) against shop (digraph sh, one sound). Say each and decide whether you hear two sounds or one new one.
Try clap (blend cl) against chip (digraph ch). In clap you hear /c/ then /l/; in chip the ch is one sound, /ch/.
The test is your ears, not your eyes. Count the sounds at the start: two sounds means a blend, one new sound means a digraph.
- Is st a blend or a digraph? How do you know?
- Say stop and shop. Which one starts with two sounds?
- In clap, do you hear one sound or two at the start?
Common misconceptions and how to address them
MisconceptionThe two letters of a blend make one new sound, like a digraph, so st says a single sound.
Why it happens: Children have just learned digraphs, where two letters make one sound, and apply that habit to every pair of letters.
How to address it: Say the word slowly and show you hear /s/ then /t/ in stop, two sounds. Count the sounds. Two sounds means a blend, so keep both.
MisconceptionA blend and a digraph are the same because both are two letters.
Why it happens: Both are two consonants side by side, so they look alike on the page.
How to address it: Contrast by ear: st in stop (two sounds) against sh in shop (one new sound). Your ears, not your eyes, tell them apart.
MisconceptionYou only need to write one of the two blend letters, so clap is spelled cap.
Why it happens: If a child rushes the blend, they hear or write only one of the two sounds.
How to address it: Stretch the word and count every sound. /c/ and /l/ are two sounds, so write two letters. Missing one makes a different word, cap instead of clap.
MisconceptionA blend only lives at the start of a word.
Why it happens: Children meet initial blends first, so they assume that is the only place blends appear.
How to address it: Point out blends at the end too, like nest, jump and milk. The same rule holds: hear each sound, write each letter.
MisconceptionThe two blend sounds can be split with a pause, so trip is /t/ then a stop then /r/.
Why it happens: Children over-separate the sounds when they sound a word out slowly.
How to address it: The two sounds are said quickly, holding hands, and slide straight into the vowel. Model it fast so trip pops out, not t ... r ... ip.
Guided practice (with answers)
1. Blend this word aloud, saying every sound: s, t, o, p.
Answer: stop. Four sounds pushed together, /s/ /t/ /o/ /p/, with both blend sounds kept at the start.
2. How many sounds are in the word clap, and what are they?
Answer: Four sounds: /c/ /l/ /a/ /p/. The cl blend is two sounds, not one.
3. Spell the word trip by breaking it into sounds.
Answer: t, r, i, p. Four sounds, /t/ /r/ /i/ /p/, one letter for each sound, with both blend letters written.
4. Which of these starts with a blend and which with a digraph: stop or ship?
Answer: stop starts with the blend st (two sounds, /s/ and /t/, both heard). ship starts with the digraph sh (one new sound, /sh/).
5. Read this word and say the two blend sounds you hear at the start: spin.
Answer: spin. The blend is sp: /s/ then /p/, two sounds said quickly together.
6. Say block and shock. Which one starts with a blend and which with a digraph?
Answer: block starts with the blend bl (two sounds, /b/ /l/). shock starts with the digraph sh (one new sound, /sh/).
Independent practice worksheets
Set the matching ChalkBee phonics worksheets for independent work, one blend at a time, then bring them together in a decodable reader so children apply the sounds in a real story.
Differentiation
- Teach one blend per lesson rather than all five at once, and revisit it the next day before adding the next.
- Blend with the first blend sound already read for the child, so they only add the second sound, the vowel and the last sound at first.
- Keep the vowel constant (stop, step, stub) so only the last sound changes and the blend stays in focus.
- Use sound boxes, one box per sound, so the child sees that a blend needs two boxes, not one.
- Add blends at the end of words as well as the start (nest, jump, milk, hand).
- Introduce three-consonant blends such as str in string or spl in splash, once two-consonant blends are secure.
- Sort a mixed pile of blend and digraph words into two columns by ear.
- Have children write their own short sentence using two blend words and read it to a partner.
Assessment: exit ticket
A quick three-part exit check done with the teacher or on a slip. It samples saying the sounds, blending to read, and spelling by segmenting.
1. Say the two sounds in the blend, then a word that starts with it: st.
Answer: /s/ then /t/, two sounds, as in stop or star.
2. Read this word aloud: trip.
Answer: trip, blended as /t/ /r/ /i/ /p/, four sounds, with both blend sounds at the start.
3. Spell the word clap.
Answer: c, l, a, p. Four sounds, /c/ /l/ /a/ /p/, with both blend letters written.
Teacher notes and timings
- Rough timing across four short lessons: Lesson 1 the two-sounds idea plus meeting bl and cl (sections 1 and 2), Lesson 2 st, tr and sp plus blending (sections 2 and 3), Lesson 3 reading and spelling (section 4), Lesson 4 blend against digraph plus the exit check (section 5 and assessment).
- Language to keep saying: two sounds you still hear. It heads off the single biggest error, squashing the two blend sounds into one.
- Sound boxes make blends visible: one box per sound means a blend fills two boxes, which shows a child why both letters get written.
- This unit pairs with the consonant digraphs unit. Teach digraphs first if you can, then use blends to sharpen the contrast: a digraph is one sound, a blend is two.
- Count the sounds at the start of any tricky word. Two sounds is a blend, one new sound is a digraph. Ears decide, not the look of the letters.
- Present mode and print both work: use the Print button for a clean teacher copy or a student handout, and project the word lists to blend straight from the screen.