In Russia you have the same class for eleven years of school. Soviet culture preferred success of group to individual progress. It was called collectivism. You had to learn how to survive in one team for a long time. Kids in elementary school have the same teacher during study. You don't change school building between elementary, middle and high school. You even don't have these concepts, just one school. So you rather see how kids are growing up in different grade pics with few new kids, not co