Alexander Inglis publishes his book
"Principles of Secondary Education".According to Inglis, the first function of schooling is adjustive, establishing fixed habits of reaction to authority. This prepares the young to accept whatever management dictates when they are grown.
Second is the diagnostic function. School determines each student’s "proper" social role, logging it mathematically on cumulative records to justify the next function, sorting. Individuals are to be trained only so far as their likely destination in the social machine, not one step beyond.
Conformity is the next function. Kids are to be made alike, not from any passion for egalitarianism, but so future behavior will be predictable, in service to market and political research.
Next is the hygienic function. This has nothing to do with individual health, only the health of the "race." This is polite code for saying that school should accelerate Darwinian natural selection by tagging the unfit so clearly they drop from the reproduction sweepstakes.
And last is the propaedutic function, a fancy word meaning that a small fraction of kids will slowly be trained to take over management of the system, guardians of a population deliberately dumbed down and rendered childlike in order that government and economic life can be managed with a minimum of hassle.