The article is devoted to the problem of organization of training sessions in large, multilevel groups. The main task of the study is to determine the most effective principles and methods of presenting the material in a large multilevel group. The article outlines the tasks facing the teacher, who plans and prepares a lesson in an enlarged group. On the examples of work of section «Russian speech etiquette» within the framework of the day of Russian language, receptions and form of group interaction of students are considered. It gives a rationale for the differentiated approach of learning as an effective method of teaching in a large multilevel group. The article discusses the benefits of gaming techniques in a differentiated learning approach. It draws attention to the importance of studying Russian speech etiquette at all stages of the study of the Russian language. In addition, the article presents examples and options of game tasks that can be used in the work of teachers of Russian as a foreign language.