Do you learn from yourself teaching? Do you find things that you had missed before? Its a little different than just learning from an instructor.
Yes to both! When you're teaching, it really makes you look at the material. You have to break it down for the newer students, so it forces you to really take a different look at it. In addition, there have been many times when a student asks questions. As I said above, it really forces you to take a more in-depth look at the material.
Mike