Vowel Digraphs & Diphthongs — Answer Key
Part A: Sort the Words
Sort each word or number into the correct category box.
1. Sort each OO word by its sound. Choose short OO (like book) or long OO (like moon).
short OO (book)
booklookfootgood long OO (moon)
moonsoonfoodcool Sorting by sound helps build phonics awareness.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. I read a book about a brave bunny.
Book uses short OO, like the sound in look and foot.
2. The moon shines bright in the night sky.
Moon uses long OO, the same sound as soon and food.
3. Please look both ways before crossing.
Look uses short OO, the same sound as book and good.
4. We will eat food for dinner tonight.
Food uses long OO, the same sound as moon and cool.
5. My shoe fits my left foot very well.
Foot uses short OO, the same sound as book and good.
Part C: True or False?
Read each statement. Circle True or False.
1. The word book has the same OO sound as moon.
True False
Book has short OO; moon has long OO, so they are different.
2. The word good rhymes with hood.
True False
Good and hood both use short OO, so they rhyme.
3. The word cool uses long OO, like moon.
True False
Cool and moon both use long OO, so the sound matches.
4. OO always makes the same sound in every word.
True False
OO can be short (book) or long (moon), so it varies.