Free Spelling Long Vowel Words Boom™ Cards Vowel Teams OA with Audio. This Spelling Game is designed for students working on spelling words with Long Vowels - oa. Students will look at the picture, listen to the word, and type the letters in the box to spell the word. Press Submit when ready. Audio / Sound is included to allow for increased student independence with the activity. Perfect activity for a center. Cute clip art! Included in this bundle!13 words are included in the deck! (e.g. c