Around 30 percent of children in the U.S. don't get enough sleep: study
Lack of sleep was definitely the cause of my terrible grades in highschool mathematics. I would stay up late (1-2 am) to play in starcraft tournaments, to have 8 am classes in mathematics. (There's a neat inverse correlation between my highschool grades and starcraft rank)<p>It's crazy to me just how terrible school systems are at optimizing for learning. I would get terrible headaches from classrooms that had too many people and too little fresh air. I thought it was just me dreading my lessons, but in reality it was from co2 ppm reaching levels that humans can't properly function in.<p>We wake up students too early, put them in rooms that kill cognitive performance and then have the audacity to complain when they can't follow along!