School daze: is private education worth it?

David Potts:

When you’re up for $150,000 in fees and extras for a child’s private-school education, it’d be nice to know it’s a good investment.
After all, a year 7 student starting next year will cost $215,000 by year 12 if school fees keep rising at an annual rate of 6 per cent.
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Could that be better spent on tutors and extensive travel to other cultures to broaden a young mind? Certainly it would be cheaper.
They might put a value on everything else but economists have a problem working out the worth of private schools, even though that’s probably where many of them went.