After announcing the collaboration with Radio 4, Sarah spoke of the child Fatima, who Street Child has been able to help.
"Now supported by Street Child, Fatima is going to school for the first time and having counselling to help her deal with the trauma of her experiences" the duchess wrote.
"With your help @streetchilduk can continue to help those affected by the Boko Haram insurgency to rebuild their lives and provide children just like Fatima with an education."