Engagement is generally understood as a multidimensional concept consisting of three forms of engagement: behavioral, emotional and cognitive engagement. Some authors find this concept incompleted and they state fourth form, agentic engagement, which is described as a purposeful, intentional and productive contribution to one's own learning that enriches and improves the learning process. Previous studies of agentic engagement were more focused more on high school students, so there is a lack of research on agentic engagement of teacher education students. . The aim of this research was to determine the positive and negative effects of agentic engagement from the perspective of teacher education students. 24 semi-structured interviews were conducted with teacher education students. A thematic analysis was conducted based on the interview transcripts. The obtained results showed that the largest number of students, as a positive effect of agentic engagement in classes for the student who shows agentic engagagement , point out that it facilitates exam preparation, memory and learning. This is followed by note-taking, teachers' clear instructions and explanations, and examples from practice. As for the positive effects of agentic engagement in classes for other students, when one of their colleagues shows agentic engagement, most often is stated that it can encourage and motivate them to get involved themselves. What stand out most among the negative effects of agentic engagement is negative reactions from teachers and resentment from less motivated colleagues. Students also stated that excessive or inappropriate agentic engagement can disrupt the dynamics of classes and the concentration of colleagues. The results of this research are based on the teacher education students' own experiences and, and can serve as guidelines for their future practice to help them to find a way to promote agentic engagement of their students. Also, they can serve as a guide for existing teachers and university teachers in order to encourage their students' agentic engagement.