It depends on what you mean by "good". In the US nuclear navy, instructors are taught many things that make them better instructors: peppering the crowd with q

It depends on what you mean by "good". In the US nuclear navy, instructors are taught many things that make them better instructors: peppering the crowd with questions, active listening, elimination of crutch words (um, uh, like, etc), changing volume levels when speaking, practicing in front of peers who's purpose is to immunize the speaker against bad crowds (pen clicking, sleeping, tapping, talking, etc). They are better. Does this make them good? Pull learning is better than push learning in basically every case. Most people recall teachers that _inspired_ them to learn, not the ones with good oration skills. Objectively, what results in "better" learning?