The answer is that it is the responsibility of both parents. I didn't know who that girl was when I was a child. Who did you grow up with? If the father goes out to work to earn money, if he lives with his mother all the time, then the mother's responsibility may be greater, but if he lives with his mother in a divorced family, the father is fully responsible and he has the responsibility of education. Anyway, educating children is a matter for both parents, not one.