Phoneme substitution activities and word chains
By the IEP Atlas editorial teamLast updated
Short answer
Phoneme substitution activities ask a student to swap one sound for another to make a new word: change /m/ in mat to /s/ and you get sat. Teach first-sound swaps, then last sounds, then vowels, then sounds inside blends. The most useful version is a word chain with letter tiles, where the student changes one letter at a time and reads each new word.
Substitution sits at the far end of the phonemic awareness continuum, next to deletion. It is also the skill that looks most like reading and spelling. When a student changes "hat" to "hot" with tiles, they are practicing the exact move they need to read and spell a new word.
This page gives the order, the scripts and ready-made word chains. The pillar on phonemic awareness interventions has the full daily routine.
What to check before you start
A student is ready for substitution when they segment 3-sound words in about 8 of 10 items and can isolate the first, last and middle sound. If the middle sound is weak, start with Elkonin boxes and point to the middle box.
Probe 10 oral items at each position: first sound, last sound and vowel. Start teaching at the first position under 8 of 10.
Step-by-step substitution activities
Step 1: Swap the first sound
"Say fan. Change /f/ to /m/." (man) First sounds are the easiest to change because they are easiest to hear. Items: fan to man, sit to fit, rug to bug, hen to ten, mop to top, lip to dip, jam to ham, pen to den.
Step 2: Swap the last sound
"Say cap. Change /p/ to /t/." (cat) Items: cap to cat, bus to bun, log to lot, him to hit, ten to tell, mad to map, sub to sun, fig to fin.
Step 3: Swap the vowel
"Say hat. Change /a/ to /o/." (hot) Vowel swaps are the hardest of the three positions, and they matter most for reading, since many decoding errors are vowel errors. Items: hat to hot, pin to pan, bed to bad, cut to cot, sit to set, lock to lick, bag to big, pup to pop.
Step 4: Pick the picture after a change
For students with limited speech or speech sound errors, put 3 pictures down: cat, hat, cot. "Start with cat. Change /k/ to /h/. Point to the new word." The student points instead of saying the answer.
Step 5: Word chains with letter tiles
This is the main event. Give the student tiles for one chain. Say each new word; the student changes one tile and reads the word.
| Chain | Focus |
|---|---|
| sat, mat, map, mop, top, tip, sip | Any position, CVC |
| bag, big, bug, beg, bed, bad, bud | Mostly vowels |
| sip, ship, shop, chop, chip, chin, thin | Digraphs |
| lap, clap, clip, slip, slap, flap, flat | Blends |
| cake, bake, bike, like, line, lane, cane | Silent e |
Say the word, not the change. "Make mat." Not "change the s to m." Hearing the new word and finding what changed is the skill. If the student is stuck, prompt: "Say sat. Say mat. Which sound changed?"
Step 6: Swap sounds inside blends
"Say flag. Change /l/ to /r/." (frag) Then with tiles. This level is hard orally, and often more useful in written form. Items: slip to snip, crab to crib, stop to step, plan to clan, grin to grip.
How much oral practice is enough
The National Reading Panel reported larger benefits when phonemic awareness instruction used letters and focused on one or two skills at a time.[1] Long runs of oral-only substitution for students who already read are debated, as covered on the phoneme deletion activities page. In practice, use oral substitution to teach the idea and check skill, then do most of the work as word chains with letters.
Worked example: Marcus, 2nd grade
Marcus is a fictional 2nd grader with a reading IEP. He reads most consonants correctly but confuses short vowels. He reads "pin" as "pen" and "cut" as "cot." On a 10-item oral probe, he swaps first sounds in 9 of 10, last sounds in 7 of 10 and vowels in 3 of 10.
His teacher runs one 7-word vowel chain each day, 5 minutes, with tiles. She scores the chain words he reads correctly and gives a separate 10-item oral vowel probe each Friday.
| Week | Oral vowel swaps (of 10) | Chain words read right (of 35 for the week) | Vowel errors in a 100-word passage |
|---|---|---|---|
| Baseline | 3 | not tested | 9 |
| 1 | 4 | 21 | 9 |
| 2 | 5 | 25 | 7 |
| 3 | 7 | 29 | 6 |
| 4 | 8 | 31 | 4 |
| 6 | 9 | 33 | 3 |
Marcus's vowel errors in connected reading fell from 9 to 3 per 100 words. That is the change the team wanted. The oral score rose too, but the passage data tells the team the skill is being used.
A goal for Marcus could read: "Given 10 spoken CVC words, Marcus will change the vowel sound to make a new word when asked for 8 of 10 words on 2 consecutive weekly probes." Baseline: 3 of 10. See swap the vowel to make a new word. For the chain version, use change one sound at a time in a word chain.
Common mistakes
- Weak: Saying "change the c to h" in an oral task. Better: Name sounds in oral items: "change /k/ to /h/." Name letters in tile items.
- Weak: Chains where every change is the first letter. Better: Change all positions, with extra vowel changes.
- Weak: Telling the student which tile to change. Better: Say the new word and let the student find the change.
- Weak: Substitution, deletion and addition mixed in one session. Better: One manipulation at a time until it is solid.
- Weak: Judging success only by the oral probe. Better: Also count errors on the same patterns in real reading.
Tools and templates
- The phonological awareness goals page has substitution templates, including change the first or last sound, pick the picture after a sound change and change a sound in a multisyllabic word.
- Record items on the opportunity trial data sheet and passage errors on the accuracy data sheet.
- Word chains carry straight into phonics. See the phonics interventions guide.
- Check a draft goal in the goal checker.
The What Works Clearinghouse guide for kindergarten to grade 3 recommends teaching students to link sounds to letters and to decode words.[2] Word chains do both in one activity.
Frequently asked questions
What is an example of phoneme substitution?
Say mat, then change /m/ to /s/ to get sat. Change the vowel in hat from /a/ to /o/ to get hot. Change the last sound in cap from /p/ to /t/ to get cat.
What is a word chain?
A list of words where each one differs from the last by one sound, such as sat, mat, map, mop. The student builds the first word with letter tiles, then changes one tile for each new word and reads it aloud.
Which substitution position is hardest?
Vowel changes are usually hardest, followed by changes inside blends. First-sound changes are easiest. Many reading errors are vowel errors, so vowel chains are worth extra time.
Use it in IEP Atlas
- Phonological awareness goals (reading)
- Phonemic awareness in the IEP glossary
- Phonics in the IEP glossary
- Opportunity trial data sheet
- IEP goal checker
Related guides
- Phonemic awareness interventions for students with IEPs
- Phoneme deletion activities, with letters and without
- Phoneme addition activities for building blends
- Blending sounds activities: phoneme blending in teaching order
- Elkonin boxes: how to use sound boxes for segmenting
Sources
- Report of the National Reading Panel: Teaching Children to Read, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- Foundational Skills to Support Reading for Understanding in Kindergarten Through 3rd Grade, What Works Clearinghouse, Institute of Education Sciences
Written and checked by the IEP Atlas editorial team under our editorial policy. This guide describes general practice and federal rules. It is not legal advice; your state may add requirements, and the IEP team makes the decisions for each student.