delta test 1 _#1

I think most important qualities of teaching are leadership and understanding of study.
First, leadership helps student can study efficient. Because of all qualified teacher has leadership on his act, students follow his lecture, and understand what they taught.
Another factor of important quality is how much teacher understands the subject. If teacher can not understand what he teaches, that’s not qualified teacher. That’s just makes students confused. So, every instructor have to know this factors.