Make a flashcard for each vowel and vowel combination. Show the students the flashcards one at a time. Have them collectively state the name of the vowel and make the sound(s) the vowel makes. For instance, a flashcard with an "a" on it would elicit the response, "'a' says /a/." Repeat these often so the students begin to associate the vowel sound with the grapheme or printed representation of the sound.
Teach the students songs that emphasize a particular vowel sound. Have the class sing the song in unison. Hold up a flashcard with the printed vowel on it and have a kinesthetic learner point to the flashcard whenever the sound is made in the song.
For example, use the song "Old Macdonald," but change the words as follows:
Old Macdonald had a farm, A-E-I-O-U,
and on this farm he had an cat, A-E-I-O-U.
With an "a- a " here and an "a- a" there,
here an "a", there an "a", everywhere an "a- a"
Old MacDonald had a farm, A-E-I-O-U.
Print a short saying, such as a quote or a line from a song, on the board. Leave blank spaces where the vowels should be. Have the students fill in the blanks with the appropriate vowels or vowel combinations. You could also model this game after the game show "Wheel of Fortune" by having the students take turns guessing the vowels.