South Sudan tops the list as the worst place in the world for girls' education
On the UN's International Day of the Girl, the development campaign, One, has created a ranking for the toughest places for girls to get an education.
All but one on the list are in Africa:
South Sudan: the world's newest country has faced much violence and war, with the destruction of schools and families forced from their homes. Almost three-quarters of girls do not even make it to primary school
Central African Republic: one teacher for every 80 pupils
Niger: only 17% of women between the ages of 15 and 24 are literate
Afghanistan: wide gender gap, with boys more likely to be in school than girls
Chad: many social and economic barriers to girls and women getting education
Mali: only 38% of girls finish primary school
Guinea: the average time in education among women over the age of 25 is less than one year
Burkina Faso: only 1% of girls complete secondary school
Liberia: almost two-thirds of primary-age pupils out of school
Ethiopia: two in five girls are married before the age of 18