The foreign language communicative competence of high school students is formed within the framework of an interdisciplinary educational approach, the main principle of which is the principle of integration. The methodological justification for solving the research problem is the interaction of sociocultural, communicative-activity, personality-oriented, cognitive approaches with the dominance of an interdisciplinary approach. This research defines the importance of developing foreign language communicative competence among high school students on the basis of an interdisciplinary approach, presents pedagogical conditions that contribute to the process of forming a foreign language communicative competence of high school students based on an interdisciplinary approach, identifies criteria and determines the levels of development of foreign language communicative competence among high school students based on an interdisciplinary approach. approach. The results obtained in the form of lesson plans and conclusions regarding the effectiveness of the interdisciplinary approach in English lessons in a general education school, aimed at the formation of foreign language communicative competence, can serve as the basis for identifying the level of formation of foreign language communicative competence of students, as well as creating teaching aids based on interdisciplinary approach in teaching foreign languages. We describe the effectiveness of integrated lessons, the stages of work for developing a lesson, the essence of which is the implementation of interdisciplinary connections.