Which of the following are not considered as key behaviours of effective teaching?

(a) Student’s success rate implies the rate at which students understand and correctly complete the exercises.

(b) Instructional variety involving teacher’s variability and flexibility during presentation.

(c) Using student’s ideas and contributions while the teacher is presenting the subject.

(d) Lesson clarity implying the extent, to which teacher’s presentation is clear to the class.

(e) Structuring through comments made for organizing what is to come.