Here in Brazil the teachers Ive spoken to get irritated by parents who expect the school to educate their kids 100%. They reckon it should be 50% from the school and 50 % from home.
I have to agree with them. When, and this is true, the parents of a class mate of one of mine called a meeting with the teacher because the latter said NO to their son. Apparently hes not used to being told that and was upset when he got home.
I was always quite pleased when mine got a rollicking at school - good training for life (and God help that little kid).