It is unnatural that kids are segregated by age into "peer groups" - in school and outside school (like at lessons). What's evolutionarily normal is to have children who are surrounded by, and interact mostly, with adults, in a group where many of the people are your family. The adults bring you up to their level. The kids keep you at your current (their) level.
No wonder kids today are more and more emotionally & intellectually stunted. None of them are "the dumbest guy in the room" - because they interact almost exclusively with other kids their exact same age.
30 kids and 1 teacher… the 1 teacher is not enough of an influence to make the kids feel ashamed of being so immature.
I, for one, have thought it was clear from history that "teens" are made. I grew up with lots of responsibility and it was clear to me, even as a 10-year-old, how different that made me from the kids I went to school with. The having of the responsibility wasn't what made me different, but it obviously made me think and behave differently too.
IMO the only reason that upper middle class kids today -- who are the ones always studied -- don't develop the part of the brain that connects cause & effect, & prevents risk-taking, is because they are never allowed to have enough power to fuck up.
How can you learn that stupidity leads to crisis if you're never allowed to make your own decisions?
The brain is plastic, it changes based on what you learn. A child kept away from speech until he's 4 years old will be unable to learn to speak normally. A teenager kept away from responsibility & work of value will grow up to be...
But the "scientists" who do these studies make pronouncements about their studies, but they never say "Sheltered white upper-class kids with two parents have the following traits..." they say "Kids have the following traits..."