School girls attend a lesson at a school in the Tatar village of Belozyorye in Mordovia, Russia, on Feb. 1, 2017.
Indian Muslim girls recite the Koran at the Madrasatur-Rashaad religious school in Hyderabad, India, on June 19, 2017.
School girls walk home at Ebisu district in Tokyo, Japan, on Sept. 4, 2017.
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A young schoolgirl listens to a concert at the Glen Forest Development Centre on December 3, 2012, in Harare, Zimbabwe.
Girls attend a class at their school (damaged by a recent Saudi-led air strike) in the Red Sea port city of Hodeidah, Yemen, on Oct. 24, 2017.
Schoolgirls stand in front of the stock display board during their visit for an education program at the Colombo Stock Market in Colombo, Sri Lanka, on Nov. 24, 2017.
Girls attend a war safety awareness campaign, given by Civil Defense members, inside a school in the rebel-held besieged city of Douma, in the eastern Damascus suburb of Ghouta, Syria, on May 2, 2017.
Lorgina Minguito / Reuters
A woman accompanies some students as they wade in the shallow part of a rocky beach to their school to attend the first day of classes in Sitio Kinabuksan, Kawag village, Subic, Zambales Province, north of Manila, June 1, 2015.
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Pupils walk on September 10, 2013, inside the Gambool high school in the Garowe region, Somaliland. The school is a project funded by the European Commission and has the capacity for 1,750 pupils, both boys and girls.
Thierry Gouegnon / Reuters
Two school girls walk up Kairaba avenue in Banjul, Gambia, Jan. 24, 2017.
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Children sit on the ground with a temporary roof to protect them against the strong sun in a small village called Bilwadi in the state of Rajasthan. The children who come from nomadic families are 6-14 years old and are taught mathematics as well as reading and writing in Hindi. This photo was taken on Oct. 29, 2014.
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School students walk down a street in Hong Kong on July 4, 2016.
Two schoolgirls at a school in West Mosul, Iraq, on Aug. 2, 2017.
Children with schoolbags near a shoe stall in the settlement of Teriberka on the Arctic coast of north-west Russia, on April 27, 2017.
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Girls attend a class at a school in the forest in Xapuri, Acre State, in northwestern Brazil, on Oct. 8, 2014.
Siphiwe Sibeko / Reuters
School girls walk past riot police standing guard outside Hillbrow magistrate court during an appearance of students who were arrested during a protest demanding free education at Johannesburg's University of the Witwatersrand, South Africa, Oct. 12, 2016.
Young girls line up to enter the primary school in Sheno, Ethiopia, on Oct. 18, 2017.
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Afghan schoolgirls board a bus in Qara Zaghan village in Baghlan province on May 7, 2013.
Palestinian schoolgirls wait for a bus that will take them to school outside their home in Gaza City on Sept. 7, 2017.
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High school graduates celebrate the last day of their classes in Moscow's Red Square on May 25, 2011.
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Students of the 7th and 8th classes swimming during a school triathlon on June 19, 2010, in Berlin, Germany.
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Brazilian UN peacekeepers distribute juice and crackers to students at the Immaculate Conception School Feb. 6, 2013, in Port-au-Prince, Haiti.
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Two schoolgirls walk toward a commuter train in Kikuyu, Kenya, on Sept. 13, 2016. The railway in Kenya has a long history, with the British laying the country's first rail in 1896.
Ahmed Jadallah / Reuters
Schoolgirls walk down the street in former Iranian President Mahmoud Ahmadinejad's birth village of Aradan, east of Tehran, March 12, 2008.
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Withington Independent Girls School students celebrate getting good grades on their A Level exams on August 15, 2013, in Manchester, England.
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A Moroccan girl walks to the school in Taghzirt, an isolated village in the el-Haouz province in the High Atlas Mountains south of Marrakesh on March 4, 2016.
High school girls walk in the city of Birao in the Central African Republic on Dec. 21, 2017.
Marcelo Del Pozo / Reuters
Schoolchildren wearing costumes walk during a school excursion to a permanent exhibition at Velazquez research centre in Seville, May 11, 2009.
A girl cries while looking for her mother during the first day of classes at the Rosauro Almario elementary school in Manila, Philippines, on June 5, 2017.
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Students take the annual Scholastic Aptitude Test at the Poongmun high school in Seoul on November 13, 2014.
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Girls pose at a rural school at La Palizada in Tulcan, Carchi province, in Ecuador close to the Colombian border on Nov. 7, 2012.
Palestinian schoolgirls attend a class at a school belonging to the United Nations Relief and Works Agency for Palestine Refugees n Gaza City on Jan. 22, 2018.
A Rohingya refugee girl looks out from a makeshift school at the Palongkhali refugee camp near Cox's Bazar, Bangladesh, on Dec. 23, 2017.
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Schoolgirls in orange uniforms walk to school along a trail around Manaslu Trek, Nepal.
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Primary school students in North Korea on May 16, 2009.
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Schoolgirls wearing school uniforms on the way home on June 1, 2009, in Trinidad, Cuba.
Girls dance to celebrate the end of the school year in the rebel-held besieged city of Douma, Syria, on May 22, 2017.
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Students read outdoors at the Jigmei Gyaltsen Girls Welfare School on April 21, 2006, in Maqin County of Guoluo Tibetan Autonomous Prefecture, Qinghai Province, China. The Jigmei Gyaltsen Girls Welfare School, established in 2005, was built to provide free education for impoverished female students in pasturing areas
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Schoolgirls participate in a lesson in Kilifi, Kenya, on June 31, 2010. The students are part of an initiative called "Moving the Goalpost" which sponsors female students from the Kilifi district, where drop-out rates are high due to early marriages, teen pregnancy and a traditional bias toward educating male siblings over female.
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Children learning their lessons at home, in a village in Netrok.
Beawiharta Beawiharta / Reuters
Students hold on to the side steel bars of a collapsed bridge as they cross a river to get to school at Sanghiang Tanjung village in Lebak regency, Indonesia's Banten village, Jan. 19, 2012.
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Chinese children attend a class at the Jinqao Center Primary School in Shanghai on Sept. 1, 2014.
Girls walk to school in the northeastern city of Damaturu, Nigeria, on Feb. 23, 2018.
Girls in uniform sit along a sidewalk while waiting for school van in Karachi, Pakistan, on Nov. 8, 2017.
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Afghani girls raise their hands to answer a question in math class.
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Hmong students exercise at Hoang Thu Pho primary school in Bac Ha, Lao Cai, Vietnam.
Muslim schoolgirls read outside during a break in Kashmir, India, on June 7, 2017.
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Girls hug each other on the first day of school outside the European School of Strasbourg in Strasbourg, France, on Sept. 1, 2015.
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Students in school uniforms pose for a photo on Sept. 29, 2015, in Beira, Mozambique.
Thaier Al-Sudani / Reuters
Girls walk past a U.S. soldier on a patrol with the Iraqi police in Baghdad's Ameen district, Oct. 14, 2008.
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Palestinian girls walk past buildings which were destroyed by Israeli strikes on their way to school in the Shejaiya neighbourhood of Gaza City on Sept. 14, 2014, on the first day of the new school year.
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Children play during a break after returning to school following a two-month strike of teachers due to criminal threats, in Acapulco, Mexico, on Jan. 27, 2015.
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Students listen to instructions during a coding class at The Young Women's Leadership School of Astoria in New York on Sept. 17, 2015.
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Schoolgirls head home through their cocoa-producing village on Nov. 11, 2015, in Akyekyere, Ghana.
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Young female students in a "pondok," a school providing general and religious studies, on June 29, 2015, in Narathiwat, Thailand.