Suburban Sprawl Stole Your Kids’ Sleep
7:30am wasn’t always when the bell rang for high schoolers. A few generations ago, the bell rang around 9 a.m. for most American kids. But according to the Centers for Disease Control and Prevention, at least 75 percent of schools surveyed in more than 40 states for a 2015 report started before 8:30 a.m., with a significant number starting in the 7 a.m. hour. And then suburbanization, the energy crisis, and a big cultural shift around child safety norms happened.