Research shows that grandparents are great personal finance teachers. Here’s what my poppa who became an accountant during the Great Depression tried to teach me about money

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Poppa once took me to a deli for dinner. I was a boy of about 10. We went to the cash register to pay, only for him to find he lacked exact change.

“I’ll owe you the nickel,” he told the cashier, who refused the offer. My grandfather fished out a dollar bill and collected 95 cents in change. “I’ll remember this,” he warned the cashier with a menacing scowl.