Britain's Prime Minister Boris Johnson plants a tree with help from P7 pupils Sophie and Oscar during a visit to Crumlin Integrated Primary School in County Antrim, Northern Ireland October 21, 2021. Paul Faith/Pool via REUTERS

Pupils at St Conval's Primary School learn about climate change ahead of U.N. climate conference COP26, in Glasgow, Scotland, Britain October 19, 2021. Picture taken October 19, 2021. REUTERS/Russell Cheyne

Pupils at St Conval's Primary School learn about climate change ahead of U.N. climate conference COP26, in Glasgow, Scotland, Britain October 19, 2021. Picture taken October 19, 2021. REUTERS/Russell Cheyne

Pupils at St Conval's Primary School learn about climate change ahead of U.N. climate conference COP26, in Glasgow, Scotland, Britain October 19, 2021. Picture taken October 19, 2021. REUTERS/Russell Cheyne

Pupils at St Conval's Primary School learn about climate change ahead of U.N. climate conference COP26, in Glasgow, Scotland, Britain October 19, 2021. Picture taken October 19, 2021. REUTERS/Russell Cheyne

Pupils at St Conval's Primary School learn about climate change ahead of U.N. climate conference COP26, in Glasgow, Scotland, Britain October 19, 2021. Picture taken October 19, 2021. REUTERS/Russell Cheyne

Pupils at St Convals Primary Glasgow learning about climate change ahead of Cop26 Glasgow, Scotland, Britain October 19, 2021. Picture taken October 19 2021 REUTERS/Russell Cheyne.

Pupils at St Conval's Primary School learn about climate change ahead of U.N. climate conference COP26, in Glasgow, Scotland, Britain October 19, 2021. Picture taken October 19, 2021. REUTERS/Russell Cheyne

Pupils at St Conval's Primary School learn about climate change ahead of U.N. climate conference COP26, in Glasgow, Scotland, Britain October 19, 2021. Picture taken October 19, 2021. REUTERS/Russell Cheyne

Pupils at St Conval's Primary School learn about climate change ahead of U.N. climate conference COP26, in Glasgow, Scotland, Britain October 19, 2021. Picture taken October 19, 2021. REUTERS/Russell Cheyne

Pupils at St Conval's Primary School learn about climate change ahead of U.N. climate conference COP26, in Glasgow, Scotland, Britain October 19, 2021. Picture taken October 19, 2021. REUTERS/Russell Cheyne

Pupils at St Conval's Primary School learn about climate change ahead of U.N. climate conference COP26, in Glasgow, Scotland, Britain October 19, 2021. Picture taken October 19, 2021. REUTERS/Russell Cheyne

A person holds a coronavirus (COVID-19) rapid antigen test in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

A girl performs a coronavirus (COVID-19) rapid antigen test in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

A mother helps a pupil to perform a coronavirus (COVID-19) rapid antigen test in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

A girl performs a coronavirus (COVID-19) rapid antigen test in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

Children wearing protective face masks wait for a coronavirus (COVID-19) rapid antigen test in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

A girl performs a coronavirus (COVID-19) rapid antigen test in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

Austria's Education Minister Werner Fassmann is seen during his visit at a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

Austria's Education Minister Werner Fassmann is seen during his visit at a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

Children and parents wearing protective face masks wait for a coronavirus (COVID-19) rapid antigen test in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

A boy waits to perform a coronavirus (COVID-19) rapid PCR test in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

Austria's Education Minister Werner Fassmann is seen during his visit at a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

Children wearing protective face masks walk to their classroom in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

Children wearing protective face masks walk to their classroom in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

Children wearing protective face masks wait in their classroom in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

Children wearing protective face masks wait in their classroom in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

Children wearing protective face masks wait in their classroom in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria, September 6, 2021. REUTERS/Leonhard Foeger

A boy performs a coronavirus disease (COVID-19) rapid PCR test in a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria September 6. 2021. REUTERS/Leonhard Foeger

Austria's Education Minister Werner Fassmann arrives at a primary school, as Austrian schools open for pupils after summer holidays, in Vienna, Austria September 6, 2021. REUTERS/Leonhard Foeger

Pupils watch the funeral of Palestinian teen Omar Abu Neal, who died of a wound he sustained during an anti-Israel protest at the Israel-Gaza border fence last week, from a school bus in Gaza City August 28, 2021. REUTERS/Suhaib Salem

Pupils take notes during a class at school in Xokleng Laklano Indigenous Land, Jose Boiteux, Santa Catarina state, Brazil, August 17, 2021. REUTERS/Amanda Perobelli SEARCH "INDIGENOUS COURT" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Carlos Guerrero, 40, with his son Diego, 7, start their journey to John F Kennedy School in the village of Sotomo, outside the town of Cochamo, Los Lagos region, Chile, August 6, 2021. Picture taken August 6, 2021. Carlos takes Diego to school daily by boat, often battling wind and rain to get him there. "I didn't have the option of going to school so you do it whatever the conditions, good or bad weather or pandemic, even if it's difficult," he said. Using tablets provided by the education ministry, the school's seven pupils can now tap into online learning material, watch films, do virtual museum visits and try out video calls to children in other schools. REUTERS/Pablo Sanhueza SEARCH "SOTOMO SANHUEZA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Steeplechase coach Boniface Tiren speaks to pupils at the Chesubet Primary school during a steeplechase exercise session, in Marakwet East of Elgeyo-Marakwet County, Kenya August 6, 2021. Picture taken August, 6 2021. REUTERS/Monicah Mwangi

Pupils at Chesubet Primary school which produced 3,000 meters steeplechase gold champions in the past Olympics, compete during a steeplechase exercise session at the school's field in Marakwet East of Elgeyo-Marakwet County, Kenya August 6, 2021. Picture taken August, 6 2021. REUTERS/Monicah Mwangi

A pupil at Kamoi Primary school jumps a hurdle as he runs during steeplechase exercise session at their schools' field in Marakwet East of Elgeyo-Marakwet County Kenya August 6, 2021. Picture taken August, 6 2021. REUTERS/Monicah Mwangi

Pupils at Chesubet Primary school which produced 3,000 meters steeplechase gold champions in the past Olympics compete during a steeplechase exercise session at the school's field in Marakwet East of Elgeyo-Marakwet County, Kenya August 6, 2021. Picture taken August, 6 2021. REUTERS/Monicah Mwangi

Pupils at Kamoi Primary school look at a drone during a steeplechase exercise session at the school's field in Marakwet East of Elgeyo-Marakwet County, Kenya August 6, 2021. Picture taken August, 6 2021. REUTERS/Monicah Mwangi

Pupils at Chesubet Primary school which produced steeplechase athletes who won gold in the past Olympics are seen in the field in Marakwet East Elgeyo-Marakwet County, Kenya August 6, 2021. Picture taken August, 6 2021. REUTERS/Monicah Mwangi

Pupils at Chesubet Primary school which produced 3,000 meters steeplechase gold champions in the past Olympics compete during a steeplechase exercise session at the school's field in Marakwet East of Elgeyo-Marakwet County, Kenya August 6, 2021. Picture taken August, 6 2021. REUTERS/Monicah Mwangi

Steeplechase coach Boniface Tiren trains a pupils at Chesubet Primary school during a steeplechase exercise session, in Marakwet East of Elgeyo-Marakwet County Kenya August 6, 2021. Picture taken August, 6 2021. REUTERS/Monicah Mwangi

A pupil of the Freiherr-vom-Stein secondary school holds up her annual school report following a school year that included both regular presence schooling as well as homeschooling, due to the coronavirus disease (COVID-19) pandemic in Bonn, Germany, July 2, 2021. REUTERS/Thilo Schmuelgen

A booklet about the coronavirus disease is seen in a Freiherr-vom-Stein secondary school classroom before pupils receive their annual school reports following a school year that included both regular presence schooling as well as homeschooling, due to the coronavirus disease (COVID-19) pandemic in Bonn, Germany, July 2, 2021. REUTERS/Thilo Schmuelgen

A pupil of the Freiherr-vom-Stein secondary school reads a booklet about the coronavirus disease after receiving her annual school report following a school year that included both regular presence schooling as well as homeschooling, due to the coronavirus disease (COVID-19) pandemic in Bonn, Germany, July 2, 2021. REUTERS/Thilo Schmuelgen


Pupils of the Freiherr-vom-Stein secondary school read their annual school reports after passing a school year that included both regular presence schooling as well as homeschooling, due to the coronavirus disease (COVID-19) pandemic in Bonn, Germany, July 2, 2021. REUTERS/Thilo Schmuelgen


Pupils of the Freiherr-vom-Stein secondary school read their annual school reports after passing a school year that included both regular presence schooling as well as homeschooling, due to the coronavirus disease (COVID-19) pandemic in Bonn, Germany, July 2, 2021. REUTERS/Thilo Schmuelgen


A pupil receives his annual school report from Martin Finke, principal of the Freiherr-vom-Stein secondary school, after passing a school year that included both regular presence schooling as well as homeschooling, due to the coronavirus disease (COVID-19) pandemic in Bonn, Germany, July 2, 2021. REUTERS/Thilo Schmuelgen


A pupil of the Freiherr-vom-Stein secondary school reads her annual school report after passing a school year that included both regular presence schooling as well as homeschooling, due to the coronavirus disease (COVID-19) pandemic in Bonn, Germany, July 2, 2021. REUTERS/Thilo Schmuelgen


Pupils of the Freiherr-vom-Stein secondary school wait for their annual school reports after passing a school year that included both regular presence schooling as well as homeschooling, due to the coronavirus disease (COVID-19) pandemic in Bonn, Germany, July 2, 2021. REUTERS/Thilo Schmuelgen

Britain's Camilla, Duchess of Cornwall, participates in a picnic with school pupils, alongside the elephant sculptures recently installed in St James's Park, London, Britain June 22, 2021. Heathcliff O'Malley/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall, participates in a picnic with school pupils, alongside the elephant sculptures recently installed in St James's Park, London, Britain June 22, 2021. Heathcliff O'Malley/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall, participates in a picnic with school pupils, alongside the elephant sculptures recently installed in St James's Park, London, Britain June 22, 2021. Heathcliff O'Malley/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall, participates in a picnic with school pupils, alongside the elephant sculptures recently installed in St James's Park, London, Britain June 22, 2021. Heathcliff O'Malley/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall, participates in a picnic with school pupils, alongside the elephant sculptures recently installed in St James's Park, London, Britain June 22, 2021. Heathcliff O'??Malley/Pool via REUTERS

French President Emmanuel Macron meets elementary school pupils in Poix-de-Picardie during a one-day-visit in northern France dedicated to the Education, reading and language, the third stage of the president's nationwide tour ahead of next year's presidential election, France June 17, 2021 . Denis Charlet/Pool via REUTERS

French President Emmanuel Macron meets elementary school pupils in Poix-de-Picardie during a one-day-visit in northern France dedicated to the Education, reading and language, the third stage of the president's nationwide tour ahead of next year's presidential election, France June 17, 2021 . Denis Charlet/Pool via REUTERS

French President Emmanuel Macron waves to elementary school pupils in Poix-de-Picardie during a one-day-visit in northern France dedicated to the Education, reading and language, the third stage of the president's nationwide tour ahead of next year's presidential election, France June 17, 2021 . Denis Charlet/Pool via REUTERS

French President Emmanuel Macron winks as he meets elementary school pupils in Poix-de-Picardie during a one-day-visit in northern France dedicated to the Education, reading and language, the third stage of the president's nationwide tour ahead of next year's presidential election, France June 17, 2021 . Denis Charlet/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall meets pupils from Notre Dame Girls School in the Clore Learning Space of the Garden Museum during a visit to open the annual British Flowers Week festival in collaboration with New Covent Garden Flower Market, in London, Britain June 10, 2021. Geoff Pugh/Pool via REUTERS

Austria's Chancellor Sebastian Kurz and Education Minister Heinz Fassmann, wearing protective face masks, talk to pupils during a visit to a public school, as the spread of the coronavirus disease (COVID-19) continues, in Vienna, Austria, June 2, 2021. REUTERS/Leonhard Foeger