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(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.)

(THE CONVERSATION) Over the holidays, most families will indulge in sugary treats. But before you offer your child a candy cane or chocolate coin, consider what research tells us about how kids perform in math is affected by what they eat for lunch – and consider making some new holiday traditions.

It may seem like a few candy canes and cookies won’t really pose much of a threat. But two potentially harmful things can happen when kids fill up on sweets. First, as your mother may ha...