For example, sometimes teachers ask some questions to students that can them think about issues. Then, students can ask more questions to the teacher. This kind of class must be very interesting because teachers and students can discuss questions together so that students can get more ideas. The second important quality for the teacher is imagination. It is an important quality for teachers.
Imagination can help teachers to prepare interesting materials.
Usually, interesting materials can attract students to listen to the lecture. If materials are very boring, maybe students will want to sleep in the class. Imagination also can help teachers to arrange activities. Activities can increase interest for the students. If every class is the same, students will not like this class.