School boards warn of potential last-minute class cancellations during COVID surge

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Some Ontario school boards say classes could be cancelled with very little notice if they don't have enough teachers available due to high rates of COVID-19.
    
Classes are set to resume in-person on Monday after schools began the term with online learning.
    
In a message to parents, the Toronto District School Board -- the province's largest -- says it's taken numerous steps to ensure staffing levels are as high as possible, but last-minute class cancellations could happen.
    
The Rainbow District School Board in northern Ontario says it may have to cancel classes day-of if there aren't enough teachers.
    
And the Ottawa-Carleton District School Board says it will make ``every effort'' to keep classes and schools open, but if it cannot operate safely, a class or school may have to pivot to remote learning.
    
It says it will try to notify parents of any cancellations or closures the night before.