did-you-know: Letting teens sleep in could save the US over $9 billion dollars a year.  Studies show teenage brains are wired to stay up and wake up late, they need 8 to 10 hours of sleep per night, and that school therefore starts too early.  It is

did-you-know: Letting teens sleep in could save the US over $9 billion dollars a year.  Studies show teenage brains are wired to stay up and wake up late, they need 8 to 10 hours of sleep per night, and that school therefore starts too early.  It is

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from: https://cool77778.tumblr.com/post/185639099757