There are currently 11 million out-of-school children in northeast Nigeria because of Boko Haram terrorist activity in the region, and that number will only rise after incidents like the suspected Dapchi kidnapping.
About 1,400 schools have been destroyed in Borno as a result of years of Boko Haram insurgency in the state, according to recent UNICEF figures. These figures estimate that 92% of those displaced internally are from the three worst-hit states in the country: Yobe, Adamawa and Borno states.

source ----> https://edition.cnn.com/2018/02/26/africa/nigeria-schoolgirls-dapchi-missing/index.html?sr=twCNN022618nigeria-schoolgirls-dapchi-missing0614PMStory