In 1905, Born Prince Ioann Konstantinovich graduated from the St. Petersburg Cadet Corps. Such educational institutions in Russia functioned as primary schools where boys were trained for a military career from a young age. 

Throughout the history of the corps, academic programs changed; all the innovations in the educational process were primarily introduced here. At the end of the 18th century, the corps was headed by the outstanding commander Mikhail Kutuzov. He revised the training of the future officers, putting first military disciplines that had not been a priority before, for example, tactics and military history. He replaced all civilian teachers with officers and divided the students into squadrons. Military classes were taken not only by the cadets, but also by officers; Mikhail Kutuzov personally taught tactics. In summer, the cadets went camping and lived in tents.

By 1917, there were 30 cadet corpses in different cities of Russia. After the Bolsheviks came to power, those educational institutions were abolished.