A few times a year, parents of elementary school children go to the school to see their children's classes.
Teachers choose a subject and teach one class.
Parents stand in the back of the class room, and watch how the teacher performs and how the children response. Sometimes after the class, a meeting is held . Parents and the teacher discuss how the children work at school or at home, how they spend after school hours and so on. Parents are not required to attend, but they consider this event very important. Many mothers go there if not busy.