Description: Within social psychology, as well as educational science frameworks, the notion of social competence has been extensively studied. Mainly examined through behaviors such as sharing, cooperating, helping others and respecting rules, this research underlines how fundamental this competence is in educational settings, since it influences students' well-being, their motivation and their academic performances (e.g., Wentzel, 1998). The aim of the work we suggest to present is to investigate a new perspective in the study of social competence. More specifically, the consequences of a specific social competence, politeness, were examined. Two studies were designed to determine the impact of students' politeness on teachers' judgment. Our results reveal that not formulating sentences in a polite way in class can have negative consequences for students. Indeed, teachers judge these students as less nice, and are less willing to help them. As a whole, these studies allow better understanding of social competence in school and suggest interesting practical implications for how to help students improve their learning and be positively judged by others.