What injustices do the parents see in the educational system? Which restriction is particularly ironic?

At school all of the girls line up twice a day and mourn the war dead. They stand in single file lines and beat their breasts. Marjane reflects that self-flagellation is a national ritual.Marjane, on the other hand, finds humor in all of the serious rituals. The girl’s parents are brought in and the principal scolds them for not educating the girls at home. The irony is that girls are discouraged from having a proper education at school.