A junior student runs along a corridor inside a school, amid Russia's attack on Ukraine, in Kyiv, Ukraine December 2, 2022. REUTERS/Valentyn Ogirenko 

A teacher conducts a hybrid mathematic lesson for junior students of a private school, amid Russia's attack on Ukraine, in Kyiv, Ukraine December 1, 2022. REUTERS/Valentyn Ogirenko 

Junior students of a private school leave a dinning room, amid Russia's attack on Ukraine, in Kyiv, Ukraine December 1, 2022. REUTERS/Valentyn Ogirenko 

Pupils from the new City junior school based within the grounds at The Honourable Society of Gray?s Inn ahead of a visit by King Charles III on November 23, 2022 in London, England. Kate Green/Pool via REUTERS 

King Charles III on his way to meet pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Kate Green/Pool via REUTERS 

King Charles III meets pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Photo by Kate Green/Pool via REUTERS 

King Charles III on his way to meet pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Kate Green/Pool via REUTERS 

King Charles III meets pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Photo by Kate Green/Pool via REUTERS 

King Charles III meets pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Photo by Kate Green/Pool via REUTERS 

King Charles III meets pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Photo by Kate Green/Pool via REUTERS 

King Charles III meets pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Photo by Kate Green/Pool via REUTERS 

King Charles III speaks to a well-wisher as he walks past pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Kate Green/Pool via REUTERS 

King Charles III meets pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Photo by Kate Green/Pool via REUTERS 

King Charles III meets pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Photo by Kate Green/Pool via REUTERS 

King Charles III meets pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Photo by Kate Green/Pool via REUTERS 

King Charles III meets pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Photo by Kate Green/Pool via REUTERS 

King Charles III meets pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Photo by Kate Green/Pool via REUTERS 

King Charles III smiles at pupils waving Union Jack flags from the new City junior school, based within the grounds, during a visit to The Honourable Society of Gray?s Inn on November 23, 2022 in London, England. Kate Green/Pool via REUTERS 

Ada Limon, the 24th Poet Laureate of the United States, asks Diane Sun, a junior at Interlake High School in Bellevue, Washington, a question about her poem during an event honoring the Class of 2022 National Student Poets Program, at the White House in Washington, U.S., September 27, 2022. REUTERS/Evelyn Hockstein 

Students from Howard Junior School in King's Lynn look on as Britain's Catherine, Princess of Wales, meets people gathered outside Sandringham Estate, following the death of Britain's Queen Elizabeth, in eastern England, Britain, September 15, 2022. REUTERS/Toby Melville/Pool 

Students from Howard Junior School in King's Lynn greet Britain's Catherine, Princess of Wales, as she meets people gathered outside Sandringham Estate, following the death of Britain's Queen Elizabeth, in eastern England, Britain, September 15, 2022. REUTERS/Toby Melville/Pool 

Students from Howard Junior School in King's Lynn speak with Britain's William, Prince of Wales, as he meets people gathered outside Sandringham Estate, following the death of Britain's Queen Elizabeth, in eastern England, Britain, September 15, 2022. REUTERS/Toby Melville/Pool 

Students from Howard Junior School in King's Lynn speak with Britain's William, Prince of Wales, as he meets people gathered outside Sandringham Estate, following the death of Britain's Queen Elizabeth, in eastern England, Britain, September 15, 2022. REUTERS/Toby Melville/Pool 

Students from Howard Junior School at King's Lynn look up as Britain's William, Prince of Wales, meets people gathered outside Sandringham Estate, following the death of Britain's Queen Elizabeth, in eastern England, Britain, September 15, 2022. REUTERS/Toby Melville/Pool 

Cooks prepare for a school lunch inside the cookroom at Senju Aoba Junior High School in Tokyo, Japan, June 29, 2022. REUTERS/Issei Kato 

Students take a school lunch at Senju Aoba Junior High School in Tokyo, Japan June 29, 2022. REUTERS/Issei Kato 

A school lunch meal including onion salt pork bowl, soup, packet of milk and sliced watermelon is seen at Senju Aoba Junior High School in Tokyo, Japan June 29, 2022. REUTERS/Issei Kato 

Students receive school lunch at Senju Aoba Junior High School in Tokyo, Japan June 29, 2022. REUTERS/Issei Kato 

Cooks prepare for a school lunch as nutritionist Kazumi Sato looks on, inside the cookroom at Senju Aoba Junior High School in Tokyo, Japan, June 29, 2022. REUTERS/Issei Kato 

Students receive school lunch at Senju Aoba Junior High School in Tokyo, Japan June 29, 2022. REUTERS/Issei Kato 

Students take a school lunch at Senju Aoba Junior High School in Tokyo, Japan June 29, 2022. REUTERS/Issei Kato 

Nutritionist Kazumi Sato checks a meal for the school lunch inside the cookroom at Senju Aoba Junior High School in Tokyo, Japan June 29, 2022. REUTERS/Issei Kato 

Students take a school lunch at Senju Aoba Junior High School in Tokyo, Japan June 29, 2022. REUTERS/Issei Kato 

Students eat school lunch at Senju Aoba Junior High School in Tokyo, Japan June 29, 2022. REUTERS/Issei Kato 

Students gesture before they start taking school lunch at Senju Aoba Junior High School in Tokyo, Japan June 29, 2022. REUTERS/Issei Kato 

A cook delivers school lunch in front of each classroom at Senju Aoba Junior High School in Tokyo, Japan June 29, 2022. REUTERS/Issei Kato 

A student eats school lunch at Senju Aoba Junior High School in Tokyo, Japan June 29, 2022. REUTERS/Issei Kato 

Sutrisno, 54, a teacher, sits at his desk at the 122 Junior High School, Jakarta, Indonesia, June 2, 2022. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN INDONESIA HAJ" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES 

Sophie, Countess of Wessex presents year four schoolchildren from Grange Park Primary School in Shropshire with commemorative Jubilee fifty pence coins to mark the successful completion of pupils achieving Junior Forester Award, during a tree planting event as part of the Queen's Green Canopy (QGC) initiative to mark the Queen's Platinum Jubilee, in Buckingham Palace, London, Britain March 31, 2022. REUTERS/Toby Melville/Pool 

A year four schoolchild from Grange Park Primary School in Shropshire receives a commemorative Jubilee fifty pence coin, denoting the seventy years of the Queen's reign, from Sophie, Countess of Wessex to mark the successful completion of pupils achieving Junior Forester Award, following the planting of an elm tree as part of the Queen's Green Canopy (QGC) initiative to mark the Queen's Platinum Jubilee, in Buckingham Palace, London, Britain March 31, 2022. REUTERS/Toby Melville/Pool 

Japan's Prince Hisahito and his father Crown Prince Akishino bow to greet before his graduation ceremony at a junior high school affiliated with Ochanomizu University, in Tokyo, Japan March 17, 2022. Eugene Hoshiko/Pool via REUTERS 

Japan's Prince Hisahito and his father Crown Prince Akishino stand next to each other before his graduation ceremony at a junior high school affiliated with Ochanomizu University, in Tokyo, Japan March 17, 2022. Eugene Hoshiko/Pool via REUTERS 

Japan's Prince Hisahito poses for the media before his graduation ceremony at a junior high school affiliated with Ochanomizu University, in Tokyo, Japan March 17, 2022. Eugene Hoshiko/Pool via REUTERS 

Japan's Prince Hisahito poses for the media before his graduation ceremony at a junior high school affiliated with Ochanomizu University, in Tokyo, Japan March 17, 2022. Eugene Hoshiko/Pool via REUTERS 

Japan's Prince Hisahito and his parents Crown Prince Akishino and Crown Princess Kiko speak with the media before his graduation ceremony at a junior high school affiliated with Ochanomizu University, in Tokyo, Japan March 17, 2022. Eugene Hoshiko/Pool via REUTERS 

Japan's Prince Hisahito and his parents Crown Prince Akishino and Crown Princess Kiko speak with the media before his graduation ceremony at a junior high school affiliated with Ochanomizu University, in Tokyo, Japan March 17, 2022. Eugene Hoshiko/Pool via REUTERS 

Japan's Prince Hisahito and his parents Crown Prince Akishino and Crown Princess Kiko pose for media before his graduation ceremony at a junior high school affiliated with Ochanomizu University, in Tokyo, Japan March 17, 2022. Eugene Hoshiko/Pool via REUTERS 

Japan's Prince Hisahito and his parents Crown Prince Akishino and Crown Princess Kiko pose for media before his graduation ceremony at a junior high school affiliated with Ochanomizu University, in Tokyo, Japan March 17, 2022. Eugene Hoshiko/Pool via REUTERS 

Japan's Prince Hisahito and his parents Crown Prince Akishino and Crown Princess Kiko pose for media before his graduation ceremony at a junior high school affiliated with Ochanomizu University, in Tokyo, Japan March 17, 2022. Eugene Hoshiko/Pool via REUTERS 

Japan's Prince Hisahito and his parents Crown Prince Akishino and Crown Princess Kiko pose for media before his graduation ceremony at a junior high school affiliated with Ochanomizu University, in Tokyo, Japan March 17, 2022. Eugene Hoshiko/Pool via REUTERS 

Japan's Prince Hisahito and his parents Crown Prince Akishino and Crown Princess Kiko pose for media before his graduation ceremony at a junior high school affiliated with Ochanomizu University, in Tokyo, Japan March 17, 2022. Eugene Hoshiko/Pool via REUTERS 

Japan's Prince Hisahito and his parents Crown Prince Akishino and Crown Princess Kiko pose for media before his graduation ceremony at a junior high school affiliated with Ochanomizu University, in Tokyo, Japan March 17, 2022. Eugene Hoshiko/Pool via REUTERS 

French President Emmanuel Macron greets French Junior Minister for Rural Affairs Joel Giraud, next to MP Jean-Baptiste Moreau during a visit in Ahun, France, January 24, 2022. Ludovic Marin/Pool via REUTERS 

Elementary school sumo wrestler Kyuta Kumagai heads to a sumo ring at a regional tournament of Junior Olympic Cup All-Japan Elementary School Sumo Championship in Kawasaki, south of Tokyo, Japan, October 17, 2021. REUTERS/Kim Kyung-Hoon 

Elementary school sumo wrestler Kyuta Kumagai competes in a sumo ring at a regional tournament of Junior Olympic Cup All-Japan Elementary School Sumo Championship in Kawasaki, south of Tokyo, Japan, October 17, 2021. REUTERS/Kim Kyung-Hoon 

Taisuke Kumagai adjusts his son Kyuta's loincloth, called a mawashi, ahead of a regional tournament of Junior Olympic Cup All-Japan Elementary School Sumo Championship in Kawasaki, south of Tokyo, Japan, October 17, 2021. REUTERS/Kim Kyung-Hoon 

Elementary school sumo wrestler Kyuta Kumagai warms up as he watches other students' competitions at a regional tournament of Junior Olympic Cup All-Japan Elementary School Sumo Championship in Kawasaki, south of Tokyo, Japan, October 17, 2021. REUTERS/Kim Kyung-Hoon 

Elementary school sumo wrestler Kyuta Kumagai stands next to other sumo wrestlers as he waits for his match at a regional tournament of Junior Olympic Cup All-Japan Elementary School Sumo Championship in Kawasaki, south of Tokyo, Japan, October 17, 2021. REUTERS/Kim Kyung-Hoon 

Elementary school sumo wrestler Kyuta Kumagai competes in a sumo ring at a regional tournament of Junior Olympic Cup All-Japan Elementary School Sumo Championship in Kawasaki, south of Tokyo, Japan, October 17, 2021. REUTERS/Kim Kyung-Hoon