When the learning outcomes of students are ensured with the employment of less resources and effort on the part of a teacher, and more initiative for self-learning is evident, which expression describes the teacher most appropriately?

An effective teacher secures the intended learning outcomes while using fewer resources and effort and prompting more self-learning.

Effectiveness measures the ratio of achieved outcomes to inputs, so the same result with less input marks a more effective teacher.

Success names only that the goal was reached, without regard to the economy of resources used.

Being intelligent describes a personal trait, not the outcome-to-input relationship of teaching.

Being practical describes a working style and again says nothing about optimal use of resources.

Effectiveness sits beside efficiency and productivity as the standard triad for judging classroom teaching.