The consonants 'ck' together make just one sound. They're called consonant digraphs.
Take a look.
stick
trick
back
pack
Now, let's learn another spelling pattern.
'oo' can make a long or short 'oo' sound.
Here are some examples of long 'oo' words.
zoo
root
school
cool
Here are some examples of short 'oo' words.
look
looked
cook
foot
Can you spell them all? Try the practice. 😺