Vowel Diphthongs 38 /ow/ sound Clayton Does The Unthinkable Clayton Does The Unthinkable Lily and Ben's Super Fun Book Club Other Vowel Sounds 39 /oy/ sound Dolch Sight Words Grade 3 (Level 2) Phonics - Consonants Level 1 Vowel Diphthongs 39 /oy/ sound Other Vowel Sounds 38 /ow/ sound