The kids / teenagers.
What is diffcult about being a teacher?
Personally, for me, I think it would be the repetition - most teachers go through the same topics, same books year after year. The kids would inject variety, but after a while it seems like the teachers are just tired of doing the same thing over and over :/
Teaching :)
Being a teacher, who must be able to inform what he/she know about the education and knowledge to students, and must be able to listen to what students ask, it's important to be patient to people or students while he/she is teaching in the class, and explain clearly of what he/she teaches.
dealing with students you need lots of patience.