In Afghanistan, girls are required by law to go to school. However, many of them never do.
Death threats, acid attacks and bombings by Taliban militants and other extremists lead many parents who support female education to keep their daughters at home.
Sometimes, it's the families themselves who stand in the way. School officials in conservative communities say relatives are often more interested in marrying off their daughters or sisters than in helping them get an education.
But some girls, like 18-year-old Rahmaniya, are fighting back.