There are 7 ‘short’ vowel sounds, although children are usually only introduced to the 5 which are most commonly heard in simple CVC (consonant, vowel, consonant) words:

• /a,(æ)/    cat, ant
• /e,(e)/     peg, egg
• /i,(I)/       pin, pig
• /o,(ɒ)/     hot, orange
•  /u,(ʌ)/     hut, bus  

The other two ‘short’ vowel sounds are:

• /oo(u),(Ʊ)/            bull or could
• /uh,(ǝ or schwa)/  zebra, doctor, corner

Our ‘Short Vowel’ Finger Chant can help you, and your child, to learn and remember the 7 ‘short vowel’ sounds: https://www.teachphonics.co.uk/phonics-resources.html