Dipthongs oi and oy
Introduction to the Concept
Oi and oy are both dipthongs. The term dipthongs come from the Greek and means “two voices” or “two sounds.” It can also be referred to as a sliding vowel as the speaker glides from one vowel sound to the other.
There are two spelling for the /oi/ sound. Oi as in boil and oy as in boy.
Oi is usually in the middle of the word and oy is usually at the end of the “word.” One might wonder about words like royal and loyal, but technically oy comes at the end of a syllable and therefore oy is correct.
Long and short vowel sounds
boil, coil, coin, devoid, embroider, embroil, enjoin, exploit, foil, hoist, join, joint, loin, humanoid, moist, noise, oil, point, poise, roil, sirloin, soil, spoil, subsoil, tabloid, tinfoil, toil, toilet, turmoil, uncoil, void
alloy, annoy, boy, boycott, convoy, clairvoyant, corduroy, coy, decoy destroy, employ enjoy, foyer, joy, lowboy, overjoy, oyster, playboy, deploy, ploy, soy, toy
Phonological Awareness Activities
Heggerty PA strategy: Take your word list of single syllable words. Roller coaster the oi words to reinforce that they are in the middle of the word and punch out the oy words to reinforce that it is at the end of the word (syllable)
Oi/oy color cards: Use oy and oi cards on two colors of paper. Have students hold up the appropriate card when the teacher says an oi/oy word. See full instructions under vowel teams ai/ay.
Manipulating words: Have students orally manipulate oi/oy words. For example:
- “Drop the /al/. What is the new word?” (roy)
- “Change the /r/ in roy to /j/. What is the new word?” (joy)
- “Drop the /y/, add /in/. What is the new word?” (join)
- “Add a /t/ to the end. What is the new word?” (joint)
- “Drop the /j/, add a /p/. What is the new word?” (point)
- “Drop the /p/, add /ment/ to the end. What is the new word?” (ointment)
- “Drop the t. What is the new word?” (join)
- “Change the/j/to a /c/. What is the new word?” (coin)
- Drop the /n/ and add /l/. What is the new word?” (coil)
- Drop the /l/. What is the new word?” (coy)
- Add /b/ to the beginning of the word. What is the new word?” (boy)
- “Add /l/ to the end of the word. What is the new word?” (boil)
This activity can be repeated with white boards or paper/pencil for review at the end of the lesson.
oi/oy phonics bundle
Florida Center for Reading Research
Scout the Sound: oi and ow activity
West Virginia Phonics
Coy and His Ploy
Coy had a ploy. It was to spoil Floyd’s joy. Floyd was poised to sing with joy in his voice. Floyd did not know that Coy had a ploy. The ploy was to spoil Floyd’s joy. Coy’s plan was to make a noise with a toy coin. The toy coin rolled away from Coy. Floyd tripped on the toy coin and fell. Now, Floyd was not poised to sing with joy in his voice.
Floyd Makes a Choice
Floyd made a choice. He liked Joy’s voice. It made a nice noise. No one had a voice like Joy. One day, Joy lost her
voice. Floyd made a choice to help Joy get back her voice. He boiled broth for Joy. The broth made Joy’s throat moist. NowJoy’s voice makes a nice noise again.
The Rolls Royce
Roy and the boy will try to ride in a Rolls Royce. The Rolls Royce will not go. There is no oil in it. Roy and the boy point Dad to the Rolls Royce for help. Roy and the boy will help Dad toil with the Rolls Royce and put oil in it.
When Dad got under the Rolls Royce, he found a snake in a coil. The coiled snake made dad run away. He fell and broke the joint in his hip. Now, Roy and the boy will not get to ride in the Rolls Royce.
Lesson 31 “A Toy for Roy”
The Literacy Nest Mini Teach