Describe the characteristics of a good teacher

In my opinion, I think a good teacher should have some following features. First of all, he should be a knowledgeable and intelligent one. Only by his fulfilled knowledge, he will be able to give his students comprehensive and correct information. And his smartness will help him to present all these ideas simply and coherently enough for every students to understand. Secondly, he should be also an honest and straightforward one that can criticize students' mistakes directly. By this way, I think students can improve most effectively by fixing their mistakes and strengthening their weaknesses. That's the teacher I want to have