Kids as young as four are being brainwashed by an ISIS spelling app at a British school.
They are taught Arabic script with pictures of swords, rockets and guns.
Bullets and ammunition are used in maths questions.
Counter-terror chiefs were alerted when a female teacher asked about study aids for kids aged four to 14.
The woman, who works at an Islamic Studies school in London, used fake name Safiyyah Huyay, one of prophet Muhammad’s wives, on Facebook.
Jihadi Abu Bakr al Janabi replied recommending IS’s Spelling Teacher app, created for children of its foreign fighters. A promotional video shows kids using the app on tablets.
They are taught the letter “taa” is for talaqa (bullet), siin is for sarokh (rocket) and baa is for bunduqiyah (gun).
It is an offence to distribute publications with the intention of encouraging terrorism.
Tory MP Alec Shelbrooke said: “Anyone who sanctions the use of an app that encourages terrorism and indoctrinates children has no place in teaching.
“I’d hope the governing body would step in and the school be monitored by Ofsted.”
In her online chat the teacher refers to the Home Office seizing her passport for extremism.
Her message about the app was seen by The Middle East Media Research Institute, which works with US intelligence.
UK counter-terror chiefs are thought to have been informed.