The effectiveness of teaching has to be judged in terms of

The effectiveness of teaching must be judged in terms of the learning outcomes of students, that is, what they actually learn.

Teaching is a means whose success is measured by the change and achievement it produces in learners.

Course coverage records how much syllabus was finished, not whether students learned it.

Students' interest is a helpful condition for learning but is not itself the proof of effective teaching.

Use of teaching aids is only a supporting tool, not the criterion of effectiveness.

This outcome-based view underlies outcome-based education, which defines success by measurable learning results.