It is indoctrination. It's literally obedience training. It's based off the Prussian Schooling Model, which was designed to create military obedience, after Prussia lost the Battle of Jena in 1806 because of poor obedience. America then re-tooled this successful Prussian Schooling Model to the industrial era, to create obedient workers. And that's literally the school system we have today. Any learning that occurs is strictly incidental, and I don't mean that in a joking way. They want the people smart enough to run the machines, but not smart enough to question the increasingly shittier conditions they're forced to endure.