Research has overwhelmingly shown that teenagers, who require nine hours of sleep, have a different circadian rhythm that delays falling asleep and waking up.  The American Academy of Pediatrics' 2014 policy statement identified early high school start times as the most crucial factor contributing to adolescent sleep deprivation.  The AAP recommends that all high schools begin the day after 8:30 AM.

High schools with later starting times show improved student grades, better attendance, lower dropout rates, fewer tardies, decreased disruptive behavior, and less depression. Starting Arlington high schools at 7:35 AM undermines optimal academic achievement.  The Arlington ISD must start the high school day at a time that provides every student the opportunity for academic success and personal well-being.

Letter to
Superintendent, Arlington ISD Dr. Marcelo Cavazos
I just signed the following petition in support of healthy school hours that recognize the biology of adolescent learners in the Arlington, Texas Independent School District.

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Start the high school day at a later time

Research has shown that a teenager's biological clock is delayed resulting in later times for falling asleep and waking up. The Arlington ISD starts the high school day at 7:30 AM. Our teens are chronically sleep deprived. High schools with later starting times show improved student grades, better attendance, lower dropout rates, fewer tardies, and less depression. The district's bottom line should be to provide an environment that is conducive to student learning.
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Sincerely,