Attempts to explore teacher educators' thoughts seem to be meaningful at educational sciences since the number of studies discussing effective teaching and effective teacher at teacher education in the eye of teacher educators are quite limited. Therefore, this study mainly aims to identify the viewpoints of teacher educators in order to discover how they contextualize the concept of effective teaching. For this aim, a case study design, increasingly used in education (Tellis, 1997), is utilized in the study. This method is suitable when the research addresses an explanatory question such as how or why? (Yin, 2004). A questionnaire including open-ended questions is given teacher educators (n=48) who are working at a state university in Turkey. The participants are asked how they conceptualize effective teaching and which characteristics of effective teachers they prioritize. The results mainly show that to know what teacher educators' opinions on the key concepts of effective teaching might be helpful for teacher educators to revise some points in their teaching and raise their awareness on the issue.