well honestly both teacher and student affect why student fails kay education is a give and take process and wala sad sya ni end sa books so life experience can also be added sa category nga education. So much better gyud if ang teacher ug student kay magkasinabot gyud pra ma enhanced ang iya learning capablity not just sa student but also sa teacher pra maka learn sad sila ug grow sa ila skills or knowledge in life.
Then also di sad gyud nato malalis na tao ra sad na sila(teachers) so ma affected gihapon na sila ug manga problema or ma tintal na sila like ma bribe or naa favoritism/hatred so naa gyud chance na maka affect na sa outcome sa grades hehe. Pero basically kung wala ni nga problema naa na ang sayop sa student, kay if they will just do well in class, concentrate and do their best dili gyud na sila mahagbong hehe.