Anti-German sentiment
Then came the First World War. With the war came anti-German sentiment. The Imperial Ministry of Education decreed that all classes were to be taught in Russian, and that the school name was to be written in Russian. Teachers who were not fluent in Russian left, and gymnastics instructor Anton Preis, a German national, was expelled by the authorities. Anti-German sentiment led some families to withdraw their children from the school, while senior students left to join the Russian army.