a dislike of education and intellectuals. The Khmer Rouge made a point of going after teachers, and indeed anyone with a degree. They were to go back to the land and be peasants.
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In an attempt to rebuild a new Cambodia with new revolutionary men and women, the Khmer Rouge set out to eradicate the old elements of Cambodia’s society, including the old education system. Like their Maoist counterparts in China, the Khmer Rouge leaders emphasized manual labor and political correctness over knowledge. They claimed "rice fields were books, and hoes were pencils." As such, Cambodia did not need an educational system. The Khmer Rouge leaders deliberately destroyed the foundations of a modern education. People with higher education such as doctors, lawyers, teachers, professors, and former college students were killed or forced to work in labor camps. The Khmer Rouge also engaged in the physical destruction of institutional infrastructure for higher education such as books, buildings, and other educational resources. It is estimated that by the end of the Khmer Rouge time, between 75 and 80 percent of Cambodian educators either were killed, died of overwork, or left the country. At least half of the written material available in the Khmer language was destroyed.
After coming to power with Vietnamese help in 1979, the government of the PRK attempted to redevelop the education system. Although significant progress was made, the process of educational redevelopment was hampered by war and lack of resources, human as well as material. The PRK government undertook a massive rehabilitation program aimed at enrolling as many students as possible. The slogan of the time was "those who know more teach those who know less." Those with almost any level of education were encouraged to work as teachers, and efforts were made to identify and encourage formers teachers, professors, and bureaucrats in the field of education to participate in this difficult endeavor. Potential teachers were given short-term training for one month, three weeks or even two weeks and then assigned teaching jobs. With many buildings destroyed, classes were taught in shacks made of leaves with dirt floors or in some places instruction was given outside under the trees.
http://www.seasite.niu.edu/khmer/Ledgerwood/education.htm