Critical and creative thinking are recognized as the most important competencies of the 21st century, necessary for students to solve complex problems, generate innovative ideas and make informed decisions. Consequently, modern education systems increasingly emphasize the role of teachers in developing these skills in the classroom. This study examines the key competencies that teachers must possess in order to effectively develop critical and creative thinking among students in general education institutions. Based on theoretical foundations and empirical research, the study examines pedagogical knowledge, learning strategies, classroom management, assessment literacy and reflexive practice of teachers as the main factors determining their competence. To determine key behavioral indicators of competence, a mixed methodological approach was applied, including a systematic review of literature, teacher surveys, and classroom observations.