Claudia Ballesteros, a teacher, teaches children during an online class in State of Mexico, Mexico, Aug. 24, 2020. Students returned to classes virtually in Mexico on Monday amid the COVID-19 pandemic. (Photo by Francisco Canedo/Xinhua)

Cesar Vazquez, a 7-year-old student, shows his painting to the camera during an online class in State of Mexico, Mexico, Aug. 24, 2020. Students returned to classes virtually in Mexico on Monday amid the COVID-19 pandemic. (Photo by Francisco Canedo/Xinhua)

Cesar Vazquez, a 7-year-old student, takes an online class in State of Mexico, Mexico, Aug. 24, 2020. Students returned to classes virtually in Mexico on Monday amid the COVID-19 pandemic. (Photo by Francisco Canedo/Xinhua)