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. It is not effective and students can not get good knowledge. If teachers have good imagination, teachers can know how to adapt materials for students. Then students can understand what teachers want to say in this class. A good teacher must use imagination to create different and new materials, then students can really receive the knowledge from teachers' lecture and they can learn very quickly.