Teacher Archana Shori poses for a picture with 7th-grade level students inside their classroom at Rukmini Devi Public school in New Delhi, India, September 7, 2015. Nearly three years after Taliban gunmen shot Pakistani schoolgirl Malala Yousafzai, the teenage activist last week urged world leaders gathered in New York to help millions more children go to school. World Teachers' Day falls on 5 October, a Unesco initiative highlighting the work of educators struggling to teach children amid intimidation in Pakistan, conflict in Syria or poverty in Vietnam. Even so, there have been some improvements: the number of children not attending primary school has plummeted to an estimated 57 million worldwide in 2015, the U.N. says, down from 100 million 15 years ago. Reuters photographers have documented learning around the world, from well-resourced schools to pupils crammed into corridors in the Philippines, on boats in Brazil or in crowded classrooms in Burundi. (Photo by Adnan Abidi/Reuters)





Class one children aged between six and seven years old pose for pictures in their classroom at Gifted Hands Educational Centre in Kenya's Kibera slum in the capital Nairobi, September 16, 2015. (Photo by Noor Khamis/Reuters)





Year 10 high school students from a vocational program with a maritime focus pose for a photograph at Artes y Oficios Melchor Lasso de la Vega school in Panama City, September 4, 2015. (Photo by Carlos Jasso/Reuters)





Teacher Guillermo Valenzuela poses for a picture with students of primary grade who are attending a night school for adults at Laura Vicuna school, in a popular neighbourhood of Santiago, September 10, 2015. (Photo by Ivan Alvarado/Reuters)





A 12th grade class at Khabazela High School pose for a picture in their classroom in eMbo, west of Durban, South Africa, September 23, 2015. (Photo by Rogan Ward/Reuters)





Teacher Kathy Stauch's 9th Grade French-immersion geography class pose for a picture at Lisgar Collegiate Institute in Ottawa, Canada, September 24, 2015. (Photo by Chris Wattie/Reuters)





Art teacher Hanna Snitko poses for a picture with final year students, aged 16 to 17, of the Ukrainian Humanities Lyceum in their classroom in Kiev, Ukraine, September 24, 2015. (Photo by Gleb Garanich/Reuters)





A class at Tyburn Primary School in Chatsworth, Durban, September 15, 2015. (Photo by Rogan Ward/Reuters)





Children of the Satere Mawe Indian tribe school at the Sahu Ape village pose for a picture in Manacapuru, Amazonas state, Brazil, July 10, 2015. (Photo by Bruno Kelly/Reuters)





Teacher Ekaterine Tsipuria poses for a picture with year 5 schoolchildren at a public school in Tbilisi, Georgia, June 8, 2015. (Photo by David Mdzinarishvili/Reuters)





A teacher leads a class session at the ecole primaire Ave Marie in Burundi's capital Bujumbura, April 24, 2015. (Photo by Thomas Mukoya/Reuters)





Children of the Municipal School Nossa Senhora da Conceicao pose for picture along the Solimoes River bank in Iranduba city, Brazil, June 17, 2015. (Photo by Bruno Kelly/Reuters)





Teacher Hanan Anzi poses for a picture with Syrian refugee students inside their classroom at one of the UNICEF schools at Al Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, September 22, 2015. (Photo by Muhammad Hamed/Reuters)





Class 11 Afghan girl students attend a class at Zarghona high school in Kabul, Afghanistan, August 15, 2015. (Photo by Omar Sobhani/Reuters)





Children of the floating Municipal School Sao Jose II pose for a picture along the Amazonas River bank in a rural area of Manaus, Brazil, June 18, 2015. (Photo by Bruno Kelly/Reuters)





First grade students and their class teacher Teruko Takakusaki (in background) pose for a photo during their homeroom period at the end of the school day at Takinogawa Elementary School in Tokyo, Japan, September 18, 2015. (Photo by Toru Hanai/Reuters)





Students cross their arms to demonstrate they are listening carefully to their teacher at Al Hakim El Kassar Primary School in Tunis, Tunisia, September 16, 2015. (Photo by Anis Mili/Reuters)





Third grade students attend class at the Mashal Model School on the outskirts of Islamabad, Pakistan September 19, 2015. (Photo by Caren Firouz/Reuters)





First grade students and their teacher Teruko Takakusaki pose for a photo during lunch at Takinogawa Elementary School in Tokyo, Japan, September 18, 2015. (Photo by Toru Hanai/Reuters)





A class from the San Frantzisko public primary school pose for a picture with their teacher, Marisa Solaguren, in the Basque fishing town of Bermeo, northern Spain, September 25, 2015. (Photo by Vincent West/Reuters)





Master Mohammad Ayoub poses with his fifth grade students at a local park in Islamabad, Pakistan September 18, 2015. (Photo by Caren Firouz/Reuters)





Teacher Ana Dorrego poses with students of the rural school Agustin Ferreira on the outskirts of Minas city, Uruguay, September 15, 2015. (Photo by Andres Stapff/Reuters)





Teacher Mahajera Armani and her class of girls pose for a picture at their study open area, founded by Bangladesh Rural Advancement Committee (BRAC), outside Jalalabad city, Afghanistan September 19, 2015. (Photo by Reuters/Parwiz)





Students of the 10th form of the Gymnasium 1567 pose for a group portrait together with their teacher of History, Tamara Eidelman, in Moscow, Russia, September 23, 2015. (Photo by Maxim Shemetov/Reuters)





Tahfiz or Koranic students recite the Koran in Madrasah Nurul Iman boarding school outside Malaysia's capital city, Kuala Lumpur, September 11, 2015. (Photo by Olivia Harris/Reuters)





Students in Dr. Hugh McCormick's lower sixth politics division (year 12) sit in their classroom in Old Schools on the last day of term at Harrow School in Middlesex, Britain, June 16, 2015. Noteable Old Harrovians include Winston Churchill, King Hussein of Jordan, Lord Byron and Benedict Cumberbatch. (Photo by Suzanne Plunkett/Reuters)





Giang Thi May teaches a first grade class at the primary school of Van Chai in Dong Van district, on the border with China, north of Hanoi, Vietnam, September 21, 2015. There is no electricity and no books. She teaches the children in the local Hmong language. (Photo by Reuters/Kham)





Pupils pose for a photograph in Ms. Yasmin Hussain's year 6 class at Salusbury Primary School in London, Britain, June 25, 2015. (Photo by Suzanne Plunkett/Reuters)





Teachers Carla Smith and Laura Johnson pose for a picture with their third grade class at Jesse Sherwood Elementary School in the Englewood neighbourhood in Chicago, Illinois, United States, September 23, 2015. (Photo by Jim Young/Reuters)





Teacher Kristine Passag holds a Values Education class for Grade 9 students in a hallway of Timoteo Paez High School in metro Manila, Philippines, September 15, 2015. Passag says she is temporarily holding classes in hallways while waiting for the completion of a new school building to address the shortage of classrooms. (Photo by Romeo Ranoco/Reuters)





Mohammed Zurob marks an exercise for his first grade students during an English lesson inside a classroom at Taha Huseen elementary school in Rafah in the southern Gaza Strip September 28, 2015. (Photo by Ibraheem Abu Mustafa/Reuters)





Teacher Elizabeth Moguel poses for a photograph with her seventh grade Latin class at Boston Latin School in Boston, Massachusetts September 17, 2015. Boston Latin School is the first and oldest public school in the U.S, founded in 1635. (Photo by Brian Snyder/Reuters)





Primary 3 pupils from Mill Strand Integrated Primary School in the town of Portrush pose for a group picture with their teacher Mrs Martin in Northern Ireland, June 17, 2015. (Photo by Cathal McNaughton/Reuters)





Tahfiz or Koranic students pose for a photograph in Madrasah Nurul Iman boarding school outside Malaysia's capital city, Kuala Lumpur September 11, 2015. There are 36 male students at the madrasah, ranging from 11 to 18 years of age. (Photo by Olivia Harris/Reuters)





Teacher Marcos Paulo Geronimo poses for a picture with first grade high school students from the Dante Alighieri school in their classroom in Sao Paulo, Brazil, September 16, 2015. (Photo by Paulo Whitake/Reuters)





Schoolchildren listen to a teacher as they study during a class in the Oudaya primary school in Rabat, September 15, 2015, at the start of the new school year in Morocco. (Photo by Youssef Boudla/Reuters)





Students in Irena Chmura's Salusbury World class, which includes students from Year 1 to Year 6, pose in their classroom in London, Britain June 25, 2015. Salusbury World is a charity that supports refugee and asylum seeking children and families. Established in 1999, it was the first refugee centre to be set up within a primary school. (Photo by Suzanne Plunkett/Reuters)





Primary 7 pupils from Glenaan Primary School in the Glens of Antrim pose for a group picture in their classroom with their teacher and school principal Mr. Close in Northern Ireland, June 22, 2015. (Photo by Cathal McNaughton/Reuters)





Teacher Reginald Sikhwari poses for a picture with his class of grade 11 students at Sekano-Ntoane school in Soweto, South Africa, September 17, 2015. (Photo by Siphiwe Sibeko/Reuters)





Teacher Moulay Ismael Lamrani poses for a picture with his class in the Oudaya primary school in Rabat, September 15, 2015, at the start of the new school year in Morocco. (Photo by Youssef Boudlal/Reuters)





Teacher Kahon Rochel poses for a picture with students inside their classroom at the the EPV Sinai primary school in Abidjan, Ivory Coast, September 28, 2015. (Photo by Luc Gnago/Reuters)





Syrian refugee students in second grade wait for the start of their first lesson of the year at Fatih Sultan Mehmet Primary School in Ankara, Turkey, September 28, 2015. (Photo by Umit Bektas/Reuters)





Year 9 Biology boys class pose for a picture with teacher Suzanne Veitch in their classroom at Forest School, London, April 27, 2015. (Photo by Russell Boyce/Reuters)





Students of the Don Bosco Technical Collegue pose for a picture in Quito, Ecuador, September 16, 2015. (Photo by Guillermo Granja/Reuters)





Teacher Manel el Ayachi poses for a picture on the first day of a new school year at Linine Street Preparatory School in Tunis, Tunisia, September 16, 2015. Schools have reopened, with around 2 million pupils heading back to classrooms after a three-month summer break. (Photo by Anis Mili/Reuters)





Teacher Father Juan Humberto Cruz poses for pictures with 4th grade students at Semillas de Esperanza (Seeds of Hope) school in Soacha, near Bogota, Colombia, June 11, 2015. (Photo by John Vizcaino/Reuters)