Death toll in Boko Haram attacks 'reach 1,500'
31 March 2014 Last updated at 10:50 BST
Amnesty International says 1,500 people have been killed in north-east Nigeria this year in attacks by Islamist militants.
As well as attacks on schools, the militant group known as Boko Haram, has hit military installations such as the main barracks in the city of Maiduguri.
Will Ross reports on the challenge of fighting Boko Haram, and watches rare footage filmed by the group of a recent attack.