Kindergarten teacher Princess Bryant prepares her classroom, from where she will begin the new school year teaching classes virtually because of the coronavirus disease (COVID-19) pandemic, at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant prepares her classroom, from where she will begin the new school year teaching classes virtually because of the coronavirus disease (COVID-19) pandemic, at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant prepares her classroom, from where she will begin the new school year teaching classes virtually because of the coronavirus disease (COVID-19) pandemic, at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant cleans the surfaces of her classroom before the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. Bryant will begin the school year teaching classes virtually from her classroom because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant prepares her classroom, from where she will begin the new school year teaching classes virtually because of the coronavirus disease (COVID-19) pandemic, at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant and paraprofessional Emily Lichtenstein (R) clean the surfaces of their classroom before the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. Bryant will begin the school year teaching classes virtually from her classroom because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant and paraprofessional Emily Lichtenstein (R) clean the surfaces of their classroom before the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. Bryant will begin the school year teaching classes virtually from her classroom because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder

Hand washing instructions hang over a sink in the classroom of kindergarten teacher Princess Bryant as she prepares for the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. Bryant will begin the school year teaching classes virtually from her classroom because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant cleans the surfaces of her classroom before the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. Bryant will begin the school year teaching classes virtually from her classroom because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant meets one of her incoming students and parents remotely before the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. Bryant will begin the school year teaching classes virtually from her classroom because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant cleans up and prepares her classroom, from where she will begin the new school year teaching classes virtually, at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant meets one of her incoming students and parents remotely before the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. Bryant will begin the school year teaching classes virtually from her classroom because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant cleans up and prepares her classroom, from where she will begin the new school year teaching classes virtually because of the coronavirus disease (COVID-19) pandemic, at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant meets one of her incoming students and parents remotely before the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. Bryant will begin the school year teaching classes virtually from her classroom because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant and paraprofessional Emily Lichtenstein (L) meet their incoming students and parents remotely before the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. Bryant will begin the school year teaching classes virtually from her classroom because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant meets one of her new students, five year-old Aryanee Cruz, and Cruz's mother Astrid and brother Ryand before the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. Bryant will begin the school year teaching classes virtually from her classroom because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder

Five year-old Aryanee Cruz and her family pick up her new Chromebook before the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. The school year will begin with virtual classes because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant cleans up and prepares her classroom, from where she will begin the new school year teaching classes virtually because of the coronavirus disease (COVID-19) pandemic, at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant and one of her new students, five year-old Aryanee Cruz, look through the backpack off school supplies Cruz picked up before the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. Bryant will begin the school year teaching classes virtually from her classroom because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder

Kindergarten teacher Princess Bryant meets one of her new students, five year-old Aryanee Cruz, while Cruz was picking up her new Chromebook before the first day of classes in the new school year at the Tynan Elementary School in Boston, Massachusetts, U.S., September 18, 2020. Bryant will begin the school year teaching classes virtually from her classroom because of the coronavirus disease (COVID-19) pandemic. REUTERS/Brian Snyder

Principal Blanca Restrepo (R) helps parent Marlen Figueroa login to the the virtual class system outside the Berkowitz Elementary School on the first day of the new school year in a city hard hit by the coronavirus disease (COVID-19) outbreak, in Chelsea, Massachusetts, U.S., September 16, 2020. REUTERS/Brian Snyder

School supplies are available for pickup at the Berkowitz Elementary School on the first day of virtually learning of the new school year in a city hard hit by the coronavirus disease (COVID-19) outbreak, in Chelsea, Massachusetts, U.S., September 16, 2020. REUTERS/Brian Snyder

Teacher Jessica Crane greets her first grade students virtually from her classroom at the Kelly Elementary School on the first day of the new school year in a city hard hit by the coronavirus disease (COVID-19) outbreak, in Chelsea, Massachusetts, U.S., September 16, 2020. REUTERS/Brian Snyder TPX IMAGES OF THE DAY

Teacher Jessica Crane greets her first grade students virtually from her classroom at the Kelly Elementary School on the first day of the new school year in a city hard hit by the coronavirus disease (COVID-19) outbreak, in Chelsea, Massachusetts, U.S., September 16, 2020. REUTERS/Brian Snyder

Teachers Mary Yi and Ibis Blanco work with their students virtually from their classroom at the Sokolowski Elementary School on the first day of the new school year in a city hard hit by the coronavirus disease (COVID-19) outbreak, in Chelsea, Massachusetts, U.S., September 16, 2020. REUTERS/Brian Snyder

Teachers Mary Yi and Ibis Blanco work with their students virtually from their classroom at the Sokolowski Elementary School on the first day of the new school year in a city hard hit by the coronavirus disease (COVID-19) outbreak, in Chelsea, Massachusetts, U.S., September 16, 2020. REUTERS/Brian Snyder

Science teacher Cristina Caruso greets her students virtually from her classroom at the Sokolowski Elementary School on the first day of the new school year in a city hard hit by the coronavirus disease (COVID-19) outbreak, in Chelsea, Massachusetts, U.S., September 16, 2020. REUTERS/Brian Snyder

Teachers Mary Yi and Ibis Blanco work with their students virtually from their classroom at the Sokolowski Elementary School on the first day of the new school year in a city hard hit by the coronavirus disease (COVID-19) outbreak, in Chelsea, Massachusetts, U.S., September 16, 2020. REUTERS/Brian Snyder

Principal Blanca Restrepo (R) helps parent Marlen Figueroa login to the the virtual class system outside the Berkowitz Elementary School on the first day of the new school year in a city hard hit by the coronavirus disease (COVID-19) outbreak, in Chelsea, Massachusetts, U.S., September 16, 2020. REUTERS/Brian Snyder

Teacher Emma Rossi greets her first grade class virtually from her classroom at the Sokolowski Elementary School on the first day of the new school year in a city hard hit by the coronavirus disease (COVID-19) outbreak, in Chelsea, Massachusetts, U.S., September 16, 2020. REUTERS/Brian Snyder

An elementary school teacher wears her Kansas City Chiefs shirt at dismissal on the first day of the NFL season in Fort Leavenworth, Kansas, U.S., September 10, 2020. Picture taken September 10, 2020. REUTERS/Arin Yoon

The remains of Berry Creek Elementary school continue to burn after the Bear Fire raged through Berry Creek, California, U.S. September 9, 2020. REUTERS/Fred Greaves

The remains of Berry Creek Elementary school continue to burn after the Bear Fire raged through Berry Creek, California, U.S. September 9, 2020. REUTERS/Fred Greaves

The remains of Berry Creek Elementary school continue to burn after the Bear Fire raged through Berry Creek, California, U.S. September 9, 2020. REUTERS/Fred Greaves

Charred debris from the Berry Creek Elementary school is seen after the Bear Fire raged through Berry Creek, California, U.S. September 9, 2020. REUTERS/Fred Greaves

The remains of Berry Creek Elementary school continue to burn after the Bear Fire raged through Berry Creek, California, U.S. September 9, 2020. REUTERS/Fred Greaves

The remains of Berry Creek Elementary school continue to burn after the Bear Fire raged through Berry Creek, California, U.S. September 9, 2020. REUTERS/Fred Greaves

Kozu elementary school students perform a traditional puppet drama in front of Kanjuro Kiritake, a Bunraku puppeteer, during a class by Kanjuro amid the coronavirus disease (COVID-19) outbreak, in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

Kozu elementary school students touch puppets made by a Bunraku puppeteer Kanjuro Kiritake, amid the coronavirus disease (COVID-19) outbreak, at Kozu elementary school in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

Kanjuro Kiritake, a Bunraku puppeteer, gives lessons in traditional puppet drama to students, amid the coronavirus disease (COVID-19) outbreak, at Kozu elementary school in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

Kanjuro Kiritake, a Bunraku puppeteer, gives lessons in traditional puppet drama to students at Kozu elementary school, amid the coronavirus disease (COVID-19) outbreak, in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

Kanjuro Kiritake, a Bunraku puppeteer, gives lessons in traditional puppet drama to students at Kozu elementary school, amid the coronavirus disease (COVID-19) outbreak, in Osaka, western Japan August 28, 2020. Picture taken August 28, 2020. REUTERS/Junko Fujita

An employee sanitises lockers in the hallways, amid the coronavirus disease (COVID-19) pandemic, at an elementary school in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

An employee wipes down door handles, amid the coronavirus disease (COVID-19) pandemic, at an elementary school in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

A sign advising the use of face masks is pictured at an elementary school, amid the coronavirus disease (COVID-19) pandemic, in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

A view shows a classroom at an elementary school, amid the coronavirus disease (COVID-19) pandemic, in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

An employee wipes down door handles, amid the coronavirus disease (COVID-19) pandemic, at an elementary school in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

A view shows an office table divided by plexiglass, amid the coronavirus disease (COVID-19) pandemic, at an elementary school in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

An employee sanitizes lockers in the hallways, amid the coronavirus disease (COVID-19) pandemic, at an elementary school in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL. TPX IMAGES OF THE DAY

An employee sanitizes lockers in the hallways, amid the coronavirus disease (COVID-19) pandemic, at an elementary school in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

An employee deep cleans the hallways, amid the coronavirus disease (COVID-19) pandemic, at an elementary school in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

An employee uses a fogger to sanitize a classroom, amid the coronavirus disease (COVID-19) pandemic, at an elementary school in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

An employee uses a fogger to sanitize lockers in the hallways, amid the coronavirus disease (COVID-19) pandemic, at an elementary school in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

An employee uses a fogger to sanitize a classroom, amid the coronavirus disease (COVID-19) pandemic, at an elementary school in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

An employee uses a fogger to sanitize lockers in the hallways, amid the coronavirus disease (COVID-19) pandemic, at an elementary school in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

A sign advising the use of face masks is pictured at an elementary school, amid the coronavirus disease (COVID-19) pandemic, in West Bloomfield Township, Michigan, U.S., September 9, 2020. REFILE - REMOVING NAME OF SCHOOL.REUTERS/Emily Elconin

A view shows a classroom at an elementary school amid the coronavirus disease (COVID-19) pandemic, in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL.

A view shows a classroom at an elementary school, amid the coronavirus disease (COVID-19) pandemic, in West Bloomfield Township, Michigan, U.S., September 9, 2020. REUTERS/Emily Elconin REFILE - REMOVING NAME OF SCHOOL. TPX IMAGES OF THE DAY

Jill Biden, wife of U.S. Democratic presidential nominee Joe Biden, participates in a socially distanced conversation about school reopening in the midst of the coronavirus disease (COVID-19) outbreak during a Biden presidential campaign appearance at the Jeffers Pond Elementary School in Prior Lake, Minnesota, U.S. September 9, 2020. REUTERS/Nicole Neri

Jill Biden, wife of U.S. Democratic presidential nominee Joe Biden, participates in a conversation about school reopening in the midst of the coronavirus disease (COVID-19) outbreak during a Biden presidential campaign appearance at the Jeffers Pond Elementary School in Prior Lake, Minnesota, U.S. September 9, 2020. REUTERS/Nicole Neri