Two letters blended together can make a long vowel sound. These are sometimes called diphthongs.
Oi and oy are different spellings that make the same vowel sound.
Ow and ou are different spellings that make the same vowel sound.
Download our Diphthongs Chart below.
Complete the words to match the pictures. Is the word missing oi or oy? Is the word missing ow or ou? How do you know which diphthong to choose? This activity has also been designed for handwriting practice.