The C or K Rule?

c and k rule

One of the most frequently asked questions that I get is: How do we know when it’s c ,k or ck. AND why does /c/ sound like /s/ sometimes?

So lets understand the rule and at the end of the page don’t forget to collect the free poster and worksheets.

So what is the rule?

At the beginning we use c or k for /k/ sound.  

We use C when we have  an A, O, or U after the /k/ sound. We use K when we have an e or i after the /k/sound.

Look at this picture to understand the rule.

c and k rule

At the end of the words it could be c, k , ck or ke for /k/ sound.

When the word contains a short vowel, it will end with CK. Here are a few examples: DUCK, STUCK, DOCK, SOCK, CLICK, FLICK, SACK. 

When the word contains a long vowel, it ends with KE. Here are a few examples: DUKE, PUKE, POKE, BLOKE, TAKE, MAKE, BIKE, LIKE.

We use C at the end of a word with 2 or more syllables. Think PICNIC, LOGIC, ARCTIC, COSMIC, DYNAMIC, ATHLETIC

We use K at the end of a word when it contains a vowel digraph (a double vowel). BOOK, LOOK, COOK, SEEK, CHEEK, MEEK, CREEK, GREEK.

c and k rule

Why Does /C/ Sound Like /S/ Sometimes?

When the sounds e, i or y come after /c/ it sounds like /s/. /C/ sounds like /k/ after any other letter!

Here are the anchor charts explaining c and k rule. All these anchor charts and worksheet are free for download for classroom use or to use them at home but do not use them commercially.

Do you like it? Rate this here