This is true. While Humboldt designed the overarching structure of the school, Johann Gottlieb Fichte argued that Prussia lost to Napoleon because they were too individualistic and was able to influence ideas of early education in those schools. The aim, through Fichte, became a system designed to break parental bonds, who he believed filled kids heads with selfish, private interests, and in turn, the goal of education was to develop children into workers and soldiers. Fichte famously suggested that a proper education should destroy a student's free will so thoroughly that they could never choose to do anything other than what the state required.

https://en.wikipedia.org/wiki/John_Taylor_Gatto Gatto asserts the following regarding what school does to children in Dumbing Us Down:

    It confuses the students. It presents an incoherent ensemble of information that the child needs to memorize to stay in school. Apart from the tests and trials, this programming is similar to the television; it fills almost all the "free" time of children. One sees and hears something, only to forget it again.
    It teaches them to accept their class affiliation.
    It makes them indifferent.
    It makes them emotionally dependent.
    It makes them intellectually dependent.
    It teaches them a kind of self-confidence that requires constant confirmation by experts (provisional self-esteem).
    It makes it clear to them that they cannot hide, because they are always supervised.[

Maybe the real lesson is that public education has always had both impulses: emancipation and formation on one hand, conformity and state needs on the other

Got any references for this? It’s pretty interesting, would like to know more.