The CK Ending — Why It's Duck Not Duk! The Phonics Lab
Level 2 · Article 7 of 75
The CK Ending! 🦆
Why is it duck and not duk? Why back and not bak? The CK rule explains it all!
The Secret 🔑
🤫
The Rule
Use CK at the end of a word when there is a short vowel right before the /k/ sound — like duck, back, sick, lock, luck. If the vowel is long or there is another consonant before it — just use K alone!
Quick reminder — the 5 short vowels! 🔴
👆 Tap each vowel to hear its SHORT sound!
A
/a/ — ant
E
/e/ — egg
I
/i/ — itch
O
/o/ — odd
U
/u/ — up
CK word families — one for each vowel! 🎨
👆 Tap any word to hear it!
A short A + CK
back
rack
pack
jack
E short E + CK
neck
deck
peck
beck
I short I + CK
sick
kick
pick
tick
O short O + CK
lock
dock
rock
sock
U short U + CK
duck
luck
tuck
buck
📏
The Quick CK Rule Checker!
1
Does the word end in a /k/ sound?
2
Is there a short vowel right before it — A, E, I, O, U?
3
YES → use CK — like duck, back, sick!
4
NO → use K alone — like milk, dark,usk!
🎯
The Challenge — Read this silly sentence!
"The duck sat on a rock and kicked a big pack into the lock!"
A very cheeky duck climbed onto a rock, gave a mighty kick to a backpack, and sent it flying straight into a lock! Can you spot every CK word in the sentence? There are five! 😄
⚠️ Rule Breaker Watch!
⚠️ Not every K ending uses CK!
Words like milk, silk, bulk, dark, bark end in /k/ but do NOT use CK — because there is a consonant before the K, not a short vowel! The rule is strictly short vowel + CK only. If there is anything else before the K — just use K alone! 💪
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