Whose fault, parents or teachers?

When our kids misbehave in school, do we blame ourselves as parents or blame the teachers for not taking care of our kids?

Personally, I think it could be parents' fault should our kids misbehave. May be we didn't teach our kids about proper manners and thus they misbehave.

But it could be the teachers' fault too. When our kids are sent to school, they are under the school's care. Teachers should make sure that the students behave themselves by disciplining them. Rules and regulation should be carried out so that students don't misbehave. Otherwise, they would face the consequences..