For 15 minutes on a blistering Wednesday afternoon, students at Chester Elementary School in Toronto were set free to run through the sprinklers in their shoes and regular clothes on the field. Others preferred to climb nearby trees, or hop off an old stump to get onto the roof of the storage shed – all with the principal's enthusiastic blessing.
It was a way to cool off or find shade on a humid day. But there was something else at play.
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