The books were distributed with the help of the CIA and Pakistan's intelligence services through religious schools, known as madrassas. According to New York University Professor Dana Burde's 2014 book "Schools for Conflict or for Peace in Afghanistan," many of the textbooks are still in use today, despite efforts to purge them from the region, and they have been republished as updated editions.
Burde writes that the textbooks spanned first through 12th grades and also included "adult literacy lessons" called the "Alphabet of Jihad Literacy." Burde's 2011 version of a fifth-grade textbook - a variant of the same text published by the United States in the 1980s - has eight lessons that "glorify violence in the name of Islam."
One example taken from Burde's book includes the following:
"For the letter T: Sword (Turra): Ahmed has a sword. He does Jihad with sword. Gun (Topak): My (maternal) uncle has a gun. He does Jihad with a gun."
According to Burde, as of 2013, Taliban-controlled areas of Afghanistan require schools to use the older U.S.-made texts because "of the way they teach violence as an obligation to religion."
In 2015, apparent pictures of Islamic State textbooks were posted online, showing some of the same motifs Burde covers in her writing. The Islamic State's book covers include images of a decapitated Statue of Liberty and one that features masked Islamic State fighters aiming Kalashnikovs.
"Even if a direct link has not been tested for, however, there is strong evidence that using textbooks to create a culture of intolerance and hate is likely to increase public support for militancy," Burde writes. "Particularly when these messages are framed in religious lessons exhorting young people to engage in violence and defend their faith."