ISIS school books featuring tanks and guns as symbols in maths equations claim to show one of the ways the terror group brainwashes its "cubs of the caliphate".
The sum of all fears: A maths equations asks 'cubs of the caliphate' to add two guns to four bulletsCredit: Rex Features
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A tatty textbook shows different types of firearm that appear to have been circled by a young studentCredit: Rex Features
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Tanks bearing the ISIS flag are seen next to oranges and lemons in this bizarre page from a textbookCredit: Rex Features
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Swords and spears can be seen next to two pencils on a page from one of the books found in Mosul, northern IraqCredit: Rex Features
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The maths text books appeared to have been designed to familiarise youngsters with the weapons of warCredit: Rex Features
The first-grade textbooks askl maths questions through images of weapons, with one equation requiring students to add together two guns and four bullets.
Other questions feature military helicopters and tanks in what would appear to be attempts to familiarise youngsters with the weapons of war.
The books were reportedly seized from an elementary school in the Al Muthana district of eastern Mosul.