Students return to school amid the pandemic

A student and a teacher wear protective face masks in a classroom at a flemish primary school during its reopening as a small number of Belgian children head back to their schools with new rules and social distancing during the outbreak of the...more

Students wearing protective face masks talk while practicing social distancing in the courtyard of a flemish secondary school during its reopening in Brussels, Belgium, May 15, 2020. REUTERS/Yves Herman

Students stand on smiley face markers to maintain social distancing in the courtyard of a primary school during its reopening in Paris, France, May 14, 2020. REUTERS/Benoit Tessier

Pupils and their teacher, Paivi Tihinen of the Kirsti primary school, have their lessons outside in a nearby forest as children return to classes after eight weeks of lockdown in Espoo, Finland May 14, 2020. Heikki Saukkomaa/Lehtikuva via REUTERS

Signs to help children respect social distancing are seen on stairs at a primary school during its reopening in Paris as a small part of Parisian children head back to their schools with new rules and social distancing in France, May 14, 2020....more

Signs indicate new rules for classrooms at a flemish primary school during its reopening in Brussels, Belgium May 15, 2020. REUTERS/Johanna Geron

A child, part of a small group aged between 6 to 10 years old, sits in a classroom at a nursery school as part of a pilot test to see how social distancing can work in schools throughout the region of Piedmont during the coronavirus disease...more

Green dots are placed in the schoolyard to help students keep distancing as schools outside the greater Montreal region begin to reopen their doors in Saint-Jean-sur-Richelieu, Quebec, Canada May 11, 2020. REUTERS/Christinne Muschi

Pupils sitting behind partitions made of plexiglass attend a class at a primary school in Den Bosch, Netherlands, May 8, 2020. In the Netherlands, the Springplank school in the city of Den Bosch installed plastic shields around students' desks and...more

A student has her hands sanitized in the schoolyard in Saint-Jean-sur-Richelieu, Quebec, Canada May 11, 2020. REUTERS/Christinne Muschi

A teacher gestures as students sit in a classroom in an elementary school reopened following the ease of restrictions in the settlement of Maale Adumim in the Israeli-occupied West Bank May 3, 2020. Israel reopened some schools this month but the...more

A child looks at a book in a classroom as part of a pilot test to see how social distancing can work in schools throughout the region of Piedmont, near Vercelli, Italy, May 12, 2020. REUTERS/Massimo Pinca

A sign reading "Keep your distance"  is seen above toilets at a primary school on the eve of its reopening in Nice, France, May 11, 2020.  REUTERS/Eric Gaillard

Parents wait with their children to enter their elementary school in Sderot, Israel May 3, 2020. REUTERS/Amir Cohen

A child, part of a small group aged between 6 to 10 years-old, uses sanitizing gel at a makeshift classroom inside a gym, as part of a pilot test to see how social distancing can work in schools throughout the region of Piedmont, near Vercelli,...more

Schoolchildren listen to their teacher at Simone Veil school during its reopening in Nice in France, May 12, 2020. REUTERS/Eric Gaillard

Children line up as they enter Simone Veil school during its reopening in Nice, France, May 12, 2020. REUTERS/Eric Gaillard

A teacher teaches in a classroom at a private school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing in France, May 12, 2020....more

A child sits in a makeshift classroom inside a gym, as part of a pilot test to see how social distancing can work in schools throughout the region of Piedmont, near Vercelli, Italy, May 12, 2020. REUTERS/Massimo Pinca

A teacher talks to schoolchildren in the courtyard at a private school during its reopening in Saint-Sebastien-sur-Loire near Nantes, France, May 12, 2020. REUTERS/Stephane Mahe

A teacher talks to schoolchildren in the courtyard at a private school during its reopening in Saint-Sebastien-sur-Loire near Nantes, France, May 12, 2020. REUTERS/Stephane Mahe

A schoolgirl washes her hands as she enters Simone Veil primary school in Nice, France, May 12, 2020. REUTERS/Eric Gaillard

A schoolgirl is seen at the primary school Simone Veil during its reopening in Nice, France, May 12, 2020. REUTERS/Eric Gaillard

Employees install signs on the floor to help children respect social distancing at a primary school on the eve of its reopening in Nice as France softens its strict lockdown rules, May 11, 2020. REUTERS/Eric Gaillard

Primary school students wearing protective masks attend their first day of class after the government eased a nationwide lockdown in Ho Chi Minh, Vietnam May 11, 2020. REUTERS/Yen Duong

Pasadena High School graduating student Joshua Dionisio is helped with his mortar before the official portrait at a drive-thru studio in Pasadena, California, May 8, 2020. REUTERS/Mario Anzuoni

Pasadena High School graduating student Bryan Gonzalez poses for the official portrait at a drive-thru studio in Pasadena, California, May 8, 2020. REUTERS/Mario Anzuoni

Students wearing face masks are seen inside a classroom during a government-organized media tour at a high school as more students returned to campus in Shanghai, China May 7, 2020. REUTERS/Aly Song

A student is escorted into the schoolyard by a teacher as schools outside the greater Montreal region begin to reopen their doors in Saint-Jean-sur-Richelieu, Quebec, Canada May 11, 2020. REUTERS/Christinne Muschi