Coronavirus cases spiked in reopened U.S. schools. Should Canadians be concerned? And children do it all the time.With face coverings mandated for Ontario teachers in classroom settings as a safety precaution amid the COVID-19 pandemic, Ewing worries students learning English for the first time will miss out on an important visual component.“Your face expresses so much of your message,” Ewing said. “And whether the (student) is older or younger, if they’re learning the language for the first time, they’re coming from that same starting point and they need to have those non-verbal cues to understand the message.”Face coverings, mandatory in most indoor public places across the province, can help limit the spread of COVID-19 by slowing down.