Middle, In, Inside, Center
The radical Middle and the kanji Middle are both the same. So if you know one, you know the other.
Make sure you're studying your radicals, otherwise you might find yourself in the middle of a kanji-learning problem.
ちゅう
なか
None
To remember the reading for this kanji, we use the word Chewbacca to pull up ちゅう in our memory. If you remember back to the radical 中, the middle of your mouth was stabbed with a stick. You look up to see who did it. There stands Chewbacca, doing his Chewbacca yell. And it isn't a stick in your mouth, it's an arrow from his crossbow (a bowcaster, actually). It just so happens Chewbacca's bowcaster looks just like this kanji too. Go figure.
Imagine the fear and shock you'd feel after finding out it was Chewbacca who shot the middle of your mouth (and head). Touch his fur. Look really close at his weapon. Give him a sniff, too. Just so that memory never fades away.