R-controlled vowels: how to teach ar, or, er, ir and ur
In short
An r-controlled vowel is a vowel followed by r, where the r changes the vowel's sound, as in car, fork and her. The main patterns are ar, or, and the er, ir and ur group, which share one sound. Teach each as a single unit.
What is an r-controlled vowel?
When r follows a vowel in the same syllable, it changes the vowel so much that neither the short nor the long sound fits. The a in cat and the a in car are clearly different sounds. That is why many teachers call r a bossy letter: it takes over the vowel before it.
For reading and spelling, the vowel and the r work as one unit. Students should read ar as one sound, not /a/ followed by /r/. Treating them as two separate sounds is the most common reason students misread these words.
What are the main patterns?
| Spelling | Sound | Examples |
|---|---|---|
| ar | /ar/ as in car | car, farm, star, park |
| or | /or/ as in for | for, corn, storm, short |
| er | /er/ as in her | her, fern, term, herd |
| ir | /er/ as in bird | bird, girl, first, shirt |
| ur | /er/ as in turn | turn, hurt, burn, church |
Three spellings, er, ir and ur, share one sound. For reading, that is easy: all three say /er/. For spelling, it is hard, because nothing in the sound tells you which to use. Er is the most common overall, especially at the ends of words like sister and later.
Why are er, ir and ur so hard to spell?
Because the choice is mostly a matter of memory. There are a few loose patterns. Ur turns up often in short words like burn, curl and turn, and ir often follows b, f, g or sh, as in bird, first, girl and shirt. Er dominates in suffixes and unstressed syllables. But many words have to be learned one by one.
Word sorts help a lot here. Give students a pile of words with all three spellings and have them sort by spelling, then read each column. Over time, the look of each word sticks.
How do you teach r-controlled vowels?
- Start with ar. Contrast it with short a: cat and cart, ham and harm.
- Teach ar as one sound. Mark it with one underline or one sound box.
- Read words, then sentences, with ar.
- Add or, contrasting it with short o: cod and cord, pot and port.
- Teach er, ir and ur together as one sound with three spellings.
- Sort and spell, then read connected text with all five patterns.
- Teacher
- Read this word without the r. C, a, t.
- Student
- Cat.
- Teacher
- Now I add r. C, a, r, t. The a and r work as one sound: /ar/.
- Student
- /k/ /ar/ /t/. Cart.
- Teacher
- How many sounds?
- Student
- Three.
Contrast pairs are powerful because they show what r does. A student who reads cat and cart side by side hears the change and understands why ar needs its own sound.
What about air, are, ear and other combinations?
Once the main five are solid, there are several more. Air and are both spell the sound in hair and care. Ear spells the sound in hear and near, but also the sound in earth and learn and the sound in bear. Or after w often sounds like /er/, as in word, work and world. War sounds like /wor/, as in warm and warn.
Teach these in second grade, one at a time, after the main patterns. The w effect, where w changes the vowel after it, is worth naming because it explains a group of very common words that otherwise look irregular.
How do r-controlled vowels work in longer words?
In multisyllable words, the r-controlled syllable is one of the six syllable types, and it stays together when you divide a word. Garden is gar and den. Market is mar and ket. Students who know to keep the vowel and r together divide these words correctly.
In unstressed syllables, many r-controlled vowels sound like /er/ regardless of spelling. The ending of doctor, sugar and teacher all sound the same. That is the spelling headache of later grades, and morphology helps: the -er suffix in teacher means a person who does something.
How do accents change r-controlled vowels?
More than most patterns. In parts of New England, the American South and much of Britain, the r after a vowel is soft or silent, so car can sound close to /kah/. Students who speak that way still need to spell the r, but they may not hear it. For them, the r-controlled spelling is partly a visual pattern to learn as well as a sound to match.
Some speakers also merge or split sounds that a program treats as one. Mary, marry and merry sound alike for many Americans and different for others. Do not mark a student wrong for reading in their own accent. Focus on whether they can decode the word and spell it, and use words whose sounds are clear in your area for early lessons.
Students learning English may have a different r sound in their first language, often a tap or a trill, which can make the r-controlled vowels feel strange. Model the sound slowly, show the mouth shape, and give them plenty of chances to hear and read the patterns before expecting them to spell every one correctly.