According to Gatto, the origins of schooling as we all know it, were in Prussia, also.
On your link, go to Chapter 7, page 3, "The Prussian Connection".
So it's Hindu + Prussian, I guess. I don't care what the origins are; it's goofy, inserting a bunch of children all the same age in a room into their stupid little desks and tables, with The Authority at the front of the room feeding facts (or maybe antifacts) into their little heads and cranking the handle.