School is supposed to be a sanctuary for children to grow and learn in safety, but millions of girls across Africa are being manipulated, threatened and sexually abused by those who are supposed to be looking after them: their teachers. Reporter Kiki King and director Karim Shah visit Mozambique to investigate the disturbing phenomenon known as 'sex for grades', where teachers force schoolgirls to have sex with them in return for good grades, or their deserved grades. The Mozambican Ministry of Education found that 70% of schoolgirls are either facing this kind of harassment or witnessing it.