Most teenagers aren't staying awake til 3am, it turns out. And you can test your theory in several ways - either by checking American teenager sleep habits agai

Most teenagers aren't staying awake til 3am, it turns out. And you can test your theory in several ways - either by checking American teenager sleep habits against those in other countries where school does start later (e.g Australia - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2941425/figure/F2/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2941425/figure/...), or by looking for the existing studies that have been done on changing school times (e.g this one in Norway https://teensneedsleep.files.wordpress.com/2011/05/school-start-time-sleepiness-and-functioning-in-norwegian-adolescents.pdf https://teensneedsleep.files.wordpress.com/2011/05/school-st...) Summary: your theory doesn't appear to be supported by data.