Herding kids by age, for grade

“I’m confused. How did we conclude that the best way to prepare kids for the future is to cluster them into a setting where they are organized by age, into grades, and forced to learn the same things, at the same time and pace, 7 hours a day, 5 days a week, for 12 + years? Huh?”
― Ana Lorena Fabrega, February 3, 2020