This article is a summary of the theoretical and practical results of a large-scale scientific study of the problem of joint education of foreign students with non-native Russian language and Russian native speakers in comprehensive Russian schools. The study highlights the main stages in overcoming the difficulties of assimilation of migrant children among Russian schoolchildren in Russian schools. The paper analyses the effectiveness of attempts made by methodologists and teachers to overcome coeducational shortcomings. Traditionally these problems are solved within a differentiating methodology. By contrast, our research proposes an integrative way to solve the above-mentioned problems. An integrative approach is a dominant innovative feature of the work. The authors of the study singled out a set of principles for teaching the Russian language. Extensive research has shown that these principles unite a multilevel and multilingual team of schoolchildren in the general educational process and create a generalizing concept for teaching Russian to multinational and polyconfessional classes, including the use of specially-developed original multimedia tools, whose educational functions and structure are described in detail in the study. The article offers the results of approbation of the proposed concept and teaching tools in Russian comprehensive general education schools. © 2018, Ecozone, OAIMDD. All rights reserved.