How does Dunstan see himself as a teacher?

Dunstan liked teaching, it fit with his disposition:

I have been a good teacher because I have never thought much about teaching; I just worked through the curriculum and insisted on high standards. I never played favourites, never tried to be popular, never set my heart on the success of any clever boy, and took good care that I knew my stuff. I was not easily approachable, but if approached I was civil and serious to the boy who approached me.