It used to be that education was something people did for themselves. Parents or a teacher would help children learn what they wanted to learn, when they were ready to learn it. Modern schooling forces children to learn on the teacher's schedule.
John Taylor Gatto wrote extensively of the corrupt nature of institutionalized schooling 15-20 years ago. I guess it's not polite to point out that the system is rigged against children, so Mr. Gatto's insights into more effective teaching have been successfully ignored in recent years.
https://en.wikipedia.org/wiki/John_Taylor_Gatto#Main_thesis
"Against School: How Public Education Cripples our Kids, and Why" - http://www.wesjones.com/gatto1.htm
Archive.org should have the complete text of "The Underground History of American Education", which was formerly posted in its entirety at http://www.JohnTaylorGatto.com
Also search for "I quit, I think", and ... "The Seven Lesson Schoolteacher"... several copies of these essays are scattered around the internet.