Does anyone know if there is any website that lists all teachers nationwide? Is there any website that provides classifieds service for people who look for teachers, or for independent teachers who want students in their regions?

Try the NDCA listing at:

www.NDCA.org

You have to look through the categories on the right, but it's there. You can search by location too! These instructors are all members of the NDCA...which basically means they pay membership dues. However, a lot of these instructors are certified, and they are much more likely to be experienced, reputable teachers than someone you find in the yellow pages.

Are you looking for a solicitation list, or a teacher for yourself? When choosing what list to look at,it does matter. The demographics of different types of instructors are quite variable for sales purposes.

Be more specific, and I'll check back