Primary and secondary education

A demonstrator attends a protest to demand more resources for public health system in Madrid, Spain, Sunday, Nov. 29, 2020. The organizers delivered a manifesto to the Madrid regional authorities demanding the end privatization of the health system. The mask reads in Spanish "Public health system". (AP Photo/Bernat Armangue)

West Brooklyn Community High School principal Malik Lewis, left, bumps elbows with former student Jason Cardoso after Cardoso came to pick up the diploma he earned when he graduated in March, Thursday, Nov. 19, 2020, in the Brooklyn borough of New York. Cardoso, along with many West Brooklyn students who graduated in the spring, was unable to get back to the school because he's working during school hours. The school has been forced to close three times since spring due to coronavirus. (AP Photo/Kathy Willens)

In this photo provided by Julie Mackett, the kindergarten teacher conducts her class at Ft. Meigs Elementary School, in Perrysburg, Ohio. Contact tracing and isolation protocols meant to contain the spread of the coronavirus are sidelining school employees and frustrating efforts to continue in-person learning. “I think everybody understands when you can’t have enough subs to fill the roles, it’s also a safety issue: You can’t have that many children without support from adults,” said Mackett, who went through her own two-week quarantine early in the school year after a student tested positive. (Courtesy of Julie Mackett via AP)

A student carries a math book delivered by school bus driver Kelly Maestas along his rural route outside Cuba, N.M., Oct. 19, 2020. The switch to remote learning in rural New Mexico has left some students profoundly isolated — cut off from others and the grid by sheer distance. The school system is sending school buses to students' far-flung homes to bring them assignments, meals and a little human contact. (AP Photo/Cedar Attanasio)

An attendee stands in a sterilizer as a precaution against the coronavirus as he arrives for a defense expo, DX Korea 2020, in Goyang, South Korea, Wednesday, Nov. 18, 2020. South Korea has recorded its largest daily increase in coronavirus infections in nearly three months as it gets set to tighten social distancing rules in the greater Seoul area. (AP Photo/Ahn Young-joon)

Two students right, wave goodbye to teachers and counselors after attending an in-person blended learning session at West Brooklyn Community High School, Wednesday, Nov. 18, 2020, in the Brooklyn borough of New York, after the school's principal announced that the school would be closed until further notice due to rising cases of coronavirus in the city. New York City Mayor Bill de Blasio said Wednesday he's shuttering schools to try to stop the renewed spread of the coronavirus. This is the third time the high school has had to close, with the most recent closure due to an outbreak in the immediate neighborhood, although the school has had no reported cases. (AP Photo/Kathy Willens)

People line up outside a popular pub and restaurant in St Kilda in Melbourne, Australia, Wednesday, Oct. 28, 2020. Melbourne, Australia's former coronavirus hot spot, emerged from a lockdown at midnight Tuesday, restaurants, cafes and bars were allowed to open and outdoor contact sports can resume. (AP Photo/Asanka Brendon Ratnayake)

German Chancellor Angela Merkel arrives at the weekly cabinet meeting of the German government at the chancellery in Berlin, Germany, Wednesday, Nov. 11, 2020. (AP Photo/Markus Schreiber, pool)

FILE - In this Friday, Aug. 7, 2020 file photo, Connecticut Gov. Ned Lamont speaks to reporters before surveying storm damage in the area in Westport, Conn. Connecticut Gov. Ned Lamont is self-quarantining after his chief spokesperson tested positive for COVID-19, his administration announced late Friday, Nov. 13, 2020. (AP Photo/John Minchillo, File)

FILE - In this Friday, Nov. 6, 2020 file photo, students wait to board a school bus in Wheeling, Ill. With COVID-19 infections and hospitalizations spiking to record numbers across the U.S. and abroad, many school districts are temporarily shutting down in-person classes as holidays loom. (AP Photo/Nam Y. Huh)