Zaid Adil Sultan, the Hammam al-Alil camp manager, says the ISIS school curriculum was intended to keep the jihadi ideology alive among the young even if the group was defeated.

“They gave them ‘courses’ that encouraged violence and taught them the concept and ideology of jihad,” he says. “In math, instead of teaching them that one plus one equals two, they taught them that one bullet plus one bullet equals two bullets. They opened workshops to prepare [boys] to fight, show them how to build muscle, things like that… they put young boys in mosques and gave them lectures on Islam and how to be a true jihadi.”