Teacher educators' distinct and dual task of educating future teachers includes using digital tools to support students' ongoing learning while exemplifying appropriate teaching strategies where the use of digital tools, such as response systems (RSs), are commonly occurring. RSs have been used in higher education for a long time, and many studies discuss how larger student groups answering multiple-choice questions during lectures contribute to student participation and learning. However, there is limited research on RSs, particularly related to teacher education. Therefore, this interview study aims to explore for what purposes teacher educators use RSs in teaching and what advantages and limitations they experience. In the thematic analysis, we found that the teacher educators used RSs to teach simultaneously as they were role models on how to use digital tools for learning. They used anonymous open-text answers more than multiple-choice questions to support student participation, immediately assess, and provide feedback in both larger and smaller groups. The complexity of time management connected to the use of RSs was highlighted. RSs were also used to initiate discussions with the teacher students about the purposes, advantages, and limitations of using digital tools for learning.