How will Ontario schools keep kids safe during the third wave? With schools in the province reopened, many conflicted parents are wondering what improvements—if any—have been made. Aaron Hutchins It was sometime in August 2020, before the last reopening of schools in Ontario, that Sarah Liss became fixated with ventilation. Her older child goes to school in the Toronto District School Board, in the kind of building where students complain about the sweltering heat on warmer days. Only now she was worried about COVID. With school boards and the province focusing on masks, cohort...