This study identifies effective foreign language acquisition techniques for fostering reasonable tolerance towards managing diversity in a modern heterogeneous environment where respect for the difference and uniqueness of multiple identities should comply with personal moral and ethical attitudes and views. The relevance of tolerance development is due to the expansion of conflict zones, aggression, tension along with widespread propaganda of new values, moral and ethical principlesthat are associated with intense migration and cross-cultural exchange processes. Thus, it is important to identify analytical, reflective, rational teaching techniques for developing an authentic, active, mature, tolerant attitude towards a multicultural, multiconfessional, multilingual society by the means of lingua franca, the universal language of intercultural communication.The main method of this paper, along with general scientific ones, is modeling the educational process aimed at analytical activity. An important conclusion is the feasibility of fostering critical thinking during the implementation of problem-solving and discussion tasks as a foreign language teaching tool for developing a tolerant attitude towards diversity management.

Keywords: diversity management, reasonable tolerance, lingua franca, discrimination, conformism, critical thinking.