A close notice is seen at the playground of an elementary school in Mississauga, Ontario, Canada, April 6, 2020. Students across Canada's Ontario began online learning Monday amid COVID-19 school closures. As of Monday afternoon, there were 15,862 confirmed cases of COVID-19 and 294 deaths in Canada. (Photo by Zou Zheng/Xinhua)

A grade-8 student studies online at home in Mississauga, Ontario, Canada, April 6, 2020. Students across Canada's Ontario began online learning Monday amid COVID-19 school closures. As of Monday afternoon, there were 15,862 confirmed cases of COVID-19 and 294 deaths in Canada. (Photo by Zou Zheng/Xinhua)

A grade-2 student studies online at home in Mississauga, Ontario, Canada, April 6, 2020. Students across Canada's Ontario began online learning Monday amid COVID-19 school closures. As of Monday afternoon, there were 15,862 confirmed cases of COVID-19 and 294 deaths in Canada. (Photo by Zou Zheng/Xinhua)

A grade-2 student studies online at home in Mississauga, Ontario, Canada, April 6, 2020. Students across Canada's Ontario began online learning Monday amid COVID-19 school closures. As of Monday afternoon, there were 15,862 confirmed cases of COVID-19 and 294 deaths in Canada. (Photo by Zou Zheng/Xinhua)