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A North Korean school girl looks up from reading her book while walking through a residential area Wednesday, Oct. 14, 2015 in Pyongyang, North Korea

Wong Maye-E/AP

A North Korean school girl looks up from reading her book while walking through a residential area Wednesday in Pyongyang, North Korea

A boy studies at a window of his house at Dadri in Uttar Pradesh, India, October 2, 2015.

Anindito Mukherjee/Reuters

A boy studies at a window of his house at Dadri in Uttar Pradesh, India on Friday

A child goes through his school book at a government-run school on the eve of International Literacy Day in Allahabad, India, Monday, Sept. 7, 2015. According to Indian Census 2011, the literacy rate is 74.04 percent of the total population aged seven and above, though the government has made a law that every child under the age of 14 should get free education, the problem of illiteracy is still at large especially in the rural areas

Rajesh Kumar Singh/AP

A child goes through his school book at a government-run school on the eve of International Literacy Day in Allahabad, India on Monday

An elementary school student walks past next to a rice paddy field in Kazo, north of Tokyo on Wednesday.

Issei Kato/Reuters

An elementary school student walks past next to a rice paddy field in Kazo, north of Tokyo on Wednesday

A Malaysian religious student reads the Koran at school during the Muslim holy fasting month of Ramadan in Hulu Langat, near Kuala Lumpur on June 30, 2014. Islam's holy month of Ramadan is celebrated by Muslims worldwide marked by fasting, abstaining from foods, sex and smoking from dawn to dusk for soul cleansing and strengthening the spiritual bond between them and the Almighty.

Mohd Rasfan/AFP

A student reads the Koran at school during the Muslim holy fasting month of Ramadan in Hulu Langat, near Kuala Lumpur

An Afghan refugee boy reads from the board while he and other schoolchildren attend their classes at their makeshift school on the outskirts of Islamabad, Pakistan, Friday, March 7, 2014.

Muhammed Muheisen/AP

An Afghan refugee reads from the board while he and other schoolchildren attend their classes at a makeshift school on the outskirts of Islamabad, Pakistan

Sakina waits for a teacher to recite verses from the Quran during religion class at a local mosque in Islamabad, Pakistan, Thursday, Dec. 19, 2013. Religious schools in Pakistan mostly set up in mosques are potential source of education for thousands of children.

B.K. Bangash/AP

Sakina waits for a teacher to recite verses from the Koran during religion class at a local mosque in Islamabad, Pakistan. Religious schools in Pakistan mostly set up in mosques are potential source of education for thousands of children.

A student from University College Oxford gets "trashed" after finishing his exams in Oxford, southern England June 7, 2013. Trashing is the practice at Oxford University where students have all manner of messy items thrown at them by their contemporaries after finishing their exams.

Stefan Wermuth/Reuters

A student from University College Oxford, in southern England, gets “trashed” after finishing his exams. Trashing is the practice where students have all manner of messy items thrown at them by their contemporaries after finishing their finals

Dhiraj Chepang, a grade one student, carries his bag while returning home from school at Khokana, in Lalitpur April 29, 2013.

Navesh Chitrakar/Reuters

Dhiraj Chepang, a grade one student, carries his bag while returning home from school at Khokana in Lalitpur, Nepal.