The Austrian school reforms of the 1850s and 1860s, inspired by the mindset of the democratic and civic revolutions of 1848, turned a predominantly feudal and religious school system into a modern one and brought basic education to the masses. In the following decades, literacy increased, basic knowledge spread, and the overwhelming influence of the Catholic church in school matters diminished. Yet, as an “unintended consequence,” these reforms also had great implications for the process of building what turned out to be “the Slovene nation.” This article aims to illustrate that the formation of Slovene national identity—based on the use of the Slovene language as the main marker of Slovene ethnicity—was implemented to a large extent with the help of the Austrian school system and its efforts at centralization, systematization, and modernization. Measures like the creation of a school subject for the Slovene language, Slovene reading materials in school textbooks, and statistical categorization within school administrations played a crucial role in that process.