Once, on a work trip to Montreal, Professor Lim Sun Sun was startled from sleep by a 2am telephone call from her son's teacher.
Calling from Singapore in the afternoon, more than 12 hours ahead, the science teacher asked Prof Lim to source the new workbook her son needed for term two, as stocks had run out at the school's bookshop.
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A version of this article appeared in the print edition of The Sunday Times on March 01, 2020, with the headline Parenting perils of being always connected. Subscribe