Help your child with any worksheets from class. Go over the sounds on the sheets together. Have the child explain to you the concept of short and long vowel sounds and how they learned them in class.
Sing songs about the letters. Some school classes sing songs to practice the long and short sounds. Learn the songs are review them with your child. They are often silly and entertaining for children. Look online for songs to sign if your child's class does not have any.
Print vowel picture cards. The vowel and a picture of an item with the short or long sound is printed on a flash card. Seeing the letter and the photo can help the child associate the sound and the vowel. Say the word and have your child repeat it.
Look for long and short vowel games online. There are fill-in-the-blank games along with fun visual games to help children learn the sounds. Play them together and then let your child play alone.