The report defines violent attacks as "the deliberate use of force in ways that disrupt and deter the provision of and access to education." It examines the assassination, abduction, illegal detention and torture of students, teaching staff, trade unionists, administrators and officials. It also looks at the bombing and burning of educational buildings and the closure of institutions by force. Forty percent of the world's 77 million out-of-school children live in conflict-affected and post-conflict countries, where education is particularly vulnerable to attack.