“…Recently, Russian philologists have studied the problem of teaching grammar of the Church Slavonic language in Russian educational institutions in the first half of the 18th century (Kislova, 2015(Kislova, , 2019). In particular, Kislova (2015Kislova ( , 2019 put forward a hypothesis which essence lies in the fact that in the 1720s. there were three concepts of "church education" in Russia: the first "conventional, dating back to the traditions of the 16th -17th centuries, which was based solely on teaching reading and writing, with the emphasis on memorizing Church Slavonic texts"; the second "Latin", aimed at creating a system of educational institutions on the model of Ukraine and Western Europe, which in principle omits teaching the Church Slavonic language, orienting students of theological schools from the very beginning to Latin or Greek, the third "grammatical" associated with the activities of Archbishop Theodosius (Yanovsky), which involved teaching reading and writing based on the grammar of the Church Slavonic language.…”