Critical thinking currently represents the necessary ability of an individual to orient himself in a world full of information, it allows him to search for his own identity, to form his own opinions, attitudes. Critical thinking is an individual intellectual process in which the thinker improves and cultivates the quality of his thinking, activating himself in the assessment of actions, various situations. The paper will present current theoretical approaches to understanding critical thinking and its position, we will also introduce critical thinking as one of the necessary human competencies acquired in the educational process. The paper will present the results of research by a team of experts at Constantine the Philosopher University Nitra, focused on the development of critical thinking in the educational process, which is part of the undergraduate training of future teachers and its subsequent implementation in educational practice. [For "NORDSCI International Conference Proceedings (Online, October 12-14, 2020). Book 1. Volume 3," see ED616185.]