I think both are critical. Kids naturally listen to their teachers, probably because they treat their teachers as authorities. Plus, teaching is a profession, a

I think both are critical. Kids naturally listen to their teachers, probably because they treat their teachers as authorities. Plus, teaching is a profession, a profession that demands deep expertise. A quite amusing example: parents try to teach their 7-year old fractions, and only find themselves yelling and kids crying hard. Yet when a teacher in Russian School of Mathematics teaches the same concepts, kids just understand the concept without any problem, and start to enjoy the learning process.