He is a Veteran. He keeps it honest. Nothing wrong with that. If you are not a sensitive, easily flustered person, you will do fine. He knows his math, just do what you are told.
He is very grumpy all the time. Everyone will try to be nice to his and he acts like the grinch!! He is rude and says many things that he shouldn't that offend some people.
very patient teacher. he knows how to explaing things and he goes very slow so you can get the lesson.