hamlets. Israel states its construction of the wall is for security purposes, particularly to prevent infiltration by Palestinian militants into Israel as had occurred during the Second Intifada. The Palestinians state that the barrier is meant to annex Palestinian lands (since the wall often juts deep into Palestinian territory) and control the movement of Palestinians. The barrier has negatively affected Qalqilya's economy, particularly the commercial and trade sectors, because it has separated the city from nearby Palestinian localities and bordering Arab towns in Israel, which contributed about 40% of the city's income prior to the barrier's completion. The barrier has also separated 1,836 dunams of mostly agricultural lands and open spaces within Qalqilya's jurisdiction from the city proper. Social relations between Qalqilya's inhabitants and those of other Palestinian cities have also been hindered by the barrier. Education According to the 2007 PCBS census, 95.3% of the inhabitants over the age of 10 were literate. About 75% of the illiterate population were women. The town has 21 public schools, four private schools, three schools managed by UNRWA and 13 kindergartens. All schools are overseen by the Palestinian Ministry of Higher Education. As of 2012, there were 12,286 residents enrolled in school, with 660 teaching staff. In 2007, 10.5% of the population had graduated from an institution of higher education, while 15.7% had completed secondary education, 27.5% preparatory education, 27.4% elementary education and 13.8% had no formal education. There are two colleges in the city: the Ad Da'wa Islamic College established in 1978 and a campus of the Al-Quds Open University established in 1998. Culture There are charities, recreational and cultural clubs, Qalqilya TV, and a radio station (Radio Nagham). In the Qalqilya governorate, the NGO Cultural Forum Society (جمعية منتدى المقفين الخيرية) played a role in publicizing the residents' economic and political problems due to the occupation, the wall, and settlements. International relations Qalqilya is twinned with: Mülheim, friendship. Notable people Bahaa Al-Din Dawood Bin Ismail Al-Qalqili, a scholar of the eighth century AH who taught in Aleppo and died in the year 780 AH, according to the book '"Fragments of Gold in News from Gold by Ibn General Shihab al-Din al-Hanbali al-Dimashqi Abu Ali Iyad, Fatah field commander in Jordan and Syria Najm al-Din Muhammad ibn Ahmad al-Qalqili, a scholar born in Qalqilya who moved to Al-Quds Al-Sharif as a child and later went Cairo to study at Al-Azhar University.