“With jobs, as with parties, it is best to leave when you are still having a good time.” With that, British business columnist Lucy Kellaway announced in late 2016 that she would no longer write the columns that had made her a revered figure in Britain for three decades.
But Ms. Kellaway, then 57, wasn’t planning on retiring to play golf in some sunny destination. She was preparing to teach math—or, maths, in the British parlance—in an urban, London school. Like the U.S., Britain faces a shortage of teachers in math, science and other areas essential to success in today’s world—and an abundance of people over 50 with skills and backgrounds well-suited to fill these gaps.
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