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Open Image ModalThis picture, taken May 31, 2013, shows 8-year-old Indonesian student Wahyu (second from the right) and his friends walking to school through a rice field in a Malang town on eastern Java island. (credit:Aman Rochman / AFP / Getty Images)
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Open Image ModalIndonesian student Wahyu (center), 8, during class on May 31, 2013. (credit:Aman Rochman / AFP / Getty Images)
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Open Image ModalSix-year-old monk apprentice Tandi Dorji (left) speaks with an older monk as they walk to the dining hall at a monastery in Thimphu, Bhutan, on June 4, 2013. (credit:Roberto Schmidt / AFP / Getty Images)
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Open Image ModalTandi Dorji sits in a group with other young monks repeating holy scriptures at a monastery in Thimphu on June 4, 2013. (credit:Roberto Schmidt / AFP / Getty Images)
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Open Image ModalThis picture, taken June 5, 2013, shows 7-year-old elementary school student Ryan Kao walking to school in Taipei, the capital of Taiwan. (credit:Sam Yeh / AFP / Getty Images)
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Open Image ModalElementary school student Ryan Kao (bottom left), 7, poses for a photo with his classmates at school in Taipei on June 5, 2013. (credit:Sam Yeh / AFP / Getty Images)
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Open Image ModalFilipino elementary school students ride on boats to go to Panghulo Elementary School near the Artex Compound in Malabon City in the Philippines on June 5, 2013. (credit:Noel Celis / AFP / Getty Images)
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Open Image ModalGenesis Tuazon (top right), 8, sits inside a classroom at the Panghulo Elementary School near the Artex Compound in Malabon City on June 5, 2013. (credit:Noel Celis / AFP / Getty Images)
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Open Image ModalSeven-year-old Thai student Chamaya Pamutito rides a scooter as she travels back from school with her father and mother in Bangkok on June 6, 2013. (credit:Christophe Archambault / AFP / Getty Images)
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Open Image ModalChamaya Pamutito, 7, listens to a teacher in the computer room at a school in Bangkok on June 6, 2013. (credit:Christophe Archambault / AFP / Getty Images)
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Open Image ModalSix-year-old Japanese elementary student Seishi Nishida walks to school in Tokyo on June 11, 2013. (credit:Yoshikazu Tsuno / AFP / Getty Images)
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Open Image ModalSix-year-old Japanese elemetary student Seishi Nishida raises his hand with classmates at school in Tokyo on June 11, 2013. (credit:Yoshikazu Tsuno / AFP / Getty Images)
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Open Image ModalFrances McMillan, 6, walks to school in the Coogee suburb of Sydney, Australia, on June 17, 2013. (credit:Saeed Khan / AFP / Getty Images)
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Open Image ModalFrances McMillan (right) reads a book inside a classroom at school on June 17, 2013. (credit:Saeed Khan / AFP / Getty Images)
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Open Image ModalMaia, 5, gets a hug from her nanny on her way to school outside her home in Hong Kong on June 18, 2013. (credit:Philippe Lopez / AFP / Getty Images)
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Open Image ModalMaia (center) sits at her school in Hong Kong on June 17, 2013. (credit:Philippe Lopez / AFP / Getty Images)
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Open Image ModalWei Hanqi, 9, walks to school with his mother in Beijing on June 19, 2013. (credit:Ed Jones / AFP / Getty Images)
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Open Image ModalWei Hanqi, 9, completes his homework at his home in Beijing on June 19, 2013. (credit:Ed Jones / AFP / Getty Images)
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Open Image ModalVenezuelan child Leobardo Medina, 8, goes to school in Caracas, on June 20, 2013. (credit:Leo Ramirez / AFP / Getty Images)
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Open Image ModalLeobardo Medina at school in Caracas on June 20, 2013. (credit:Leo Ramirez / AFP / Getty Images)
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Open Image ModalGari Camayo Pito (second from left), 12, a Colombian indigenous child from the Nasa ethnic group, and his sister (right) meet two cousins on their way to school on June 21, 2013. (credit:Luis Robayo / AFP / Getty Images)
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Open Image ModalGari Camayo Pito takes a Nasa Yuke native language class at school in the village of Las Guaca on June 21, 2013. (credit:Luis Robayo / AFP / Getty Images)
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Open Image ModalMargarita Samayoa kisses her 6-year-old daughter, Valentina Rodas, before she goes to school in Guatemala City on July 8, 2013. (credit:Johan Ordonez / AFP / Getty Images)
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Open Image ModalValentina Rodas stretches at school in Guatemala City on July 8, 2013. (credit:Johan Ordonez / AFP / Getty Images)
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Open Image ModalSilvia Alvarado, 10, walks to school in El Salvador on Aug. 28, 2013. (credit:Jose Cabezas / AFP / Getty Images)
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Open Image ModalSilvia Alvarado (second from right), 10, lines up before class at the Bernd Grabs School in El Salvador on July 1, 2013. (credit:Jose Cabezas / AFP / Getty Images)
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Open Image ModalCosta Rican child Gerald Sequeira, 8, greets a sweeper while going to school on Aug. 22, 2013. (credit:Hector Retamal / AFP / Getty Images)
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Open Image ModalCosta Rican child Gerald Sequeira sits at school in the La Carpio neighborhood of San Jose on June 21, 2013. (credit:Hector Retamal / AFP / Getty Images)