C is one of the most common keys in jazz, and practicing C Rhythm Changes will help you with all of the other tunes in the key of C.
C Rhythm Changes
If you want to fully understand the basics of jazz theory and start learning how to improvise from the ground up, join our LJS Inner Circle membership, where you'll get access to our theory basics course "Zero to Improv", and all of our premium courses.
"Zero to Improv"