What should a new teacher know?

Know that building rapport is also important along with imparting knowledge. A knowledgeable teacher will still be unable to capture the attention of her students if the teacher appears uninterested in the students.

As a fresh teacher, I was constantly worried about how every lesson will turn out and how students view me as a person and my teaching. We also have our bad days when the lesson just seems to go very wrong (e.g. cannot capture the attention of students or can’t work out a solution to a student’s answer) and I would be worried that this would diminish my students’ trust in me. But after a while you will realize, screwing up a lesson once or twice wouldn't matter.