Efficacy

Teachers don't only need to be able to teach their subject, but they must also be effective at teaching their subject. Two things that seem to go together in being an effective teacher is one's self-awareness and belief in one's ability.  A teacher needs to be aware of themselves, and what they are teaching.  They also have to believe in themselves and be confident in their teaching, because if the teacher isn't confident in what they are teaching, how can one expect the student to be confident in their learning ability.  Along with confidence, a teacher must be persistent on the child's responsibility as a student.  All of these skills create better teachers, which in turn creates better students.