This article is devoted to the linguoculturological competence development among schoolchildren in the process of teaching the Russian language. The object of scientific consideration was the lexeme "rainbow", which refers to the most ancient layer of words and has a deep national and cultural specificity. In accordance with the set tasks of our work, we used descriptive-analytical, stylistic, component, distributive methods of data analysis, the method of the semantic field. An integrated approach to the study of the lexeme "rainbow" implies a multifaceted analysis, including the analysis of dictionary definitions, collection of etymological information, consideration of word-formation relations, study of the paremiological status of a word, its discursive features, identification of traditional and individual author's meanings and, thus, reflection in the form of creative work of students, reflecting the information received about this lexeme... An upbringing approach in Russian language lessons helps students discover aesthetic ways of understanding the world, without which it is impossible to describe the Russian language picture of the world.