you are using two different "types of teachers" to judge his argument and construct your argument. A teacher without inclination and ability to better the stud

you are using two different "types of teachers" to judge his argument and construct your argument. A teacher without inclination and ability to better the students would perform bad even with your approach, which is "whatever approach to make student interested". I think to read the article in article's spirit, he is talking only about teachers interested and able to "teach". The article's definition of teacher is someone who can teach (make students better) and not someone who is appointed by school and is not interested in students. Considering this, the question OP is trying to address is : among the various approaches which is the best approach to teach. I would say, an article containing analysis on data is more informative to me than just making a statement, whatever approach is right.