Is the stress of the new school year causing your kid to grind their teeth? If it is, your child isn’t alone. An estimated 15 to 33 percent of children will grind their teeth at some point, compared to roughly 8 percent of adults. The majority of teeth grinding (also called bruxism) will happen after kids have dozed off to dreamland, which can make it tough for them to know it’s happening. Luckily, parents can help by learning how to spot grinding and how to help their kid overcome it.