This research examines the quality of student–teachers’ (STs’) verbal communication during their teaching practice on the ‘Studies for the Environment’ subject. It also identifies potential factors affecting it. The results reveal that student teachers clearly dominate classroom discussion, the questions they address to their students are of poor quality, and are not facilitating the development of students’ critical thinking. The findings reveal that the student teachers used types of questions that do not consider students as researchers and do not provide them the opportunity to develop the fundamental skills specified in the ‘Studies for the Environment’ curricula, requiring them to be able to investigate complex issues. The authors also found that the factors influencing STs’ verbal communication are the absence of relevant theoretical and practical background, the inappropriate training school setting and the lack of teaching experience are the most prominent.