Or maybe they'll be better prepared because they actually learned more in school. 8th graders with 1 hour of sleep less perform two whole grade levels lower on

Or maybe they'll be better prepared because they actually learned more in school. 8th graders with 1 hour of sleep less perform two whole grade levels lower on tests (i.e. like 6th graders.) There's an entire chapter of Nurture Shock devoted to this topic, and it's pretty damning.