According to UNESCO figures, this is a major challenge: around 20% of 6-11 year-olds do not attend school, with the rate rising to 33% for 12-14 year-olds and 60% for 15-17 year-olds. In Niger, for example, the average number of years of schooling is estimated at 3, while in Mali and Sudan it is barely better, at 4. Among girls, Niger has the lowest school enrolment rate in the world, at less than 60%.
