Most American teenagers have insufficient sleep, which can hurt their health and school performance. Nearly 58% of middle school students in nine states and almost 73% of high school students nationwide don't get the recommended 8-10 hours of sleep, according to the latest CDC report in MMWR.

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Most American teenagers have insufficient sleep, which can hurt their health and school performance. Nearly 58% of middle school students in nine states and almost 73% of high school students nationwide don't get the recommended 8-10 hours of sleep, according to the latest CDC report in MMWR.