How many kwans make up the art of Tae Kwon Do?

Original five Kwans:

1. Chung Do Kwan

2. Song Moo Kwan

3. Moo Duk Kwan

4. Kwon Bop Bu/Chang Moo Kwan

5. Yun Moo Kwan/Jidokwan

Nine Kwans numbered in the Korea Taekwondo Association (KTA):

#1. Songmookwan

#2. Hanmookwan

#3. Changmookwan

#4. Moodukkwan

#5. Odokwan

#6. Kangdukwan

#7. Jungdokwan

#8. Jidokwan

#9. Chungdokwan

#10. KwanRiKwan (The administrative Kwan)