The purpose of this study is to investigate how students deal with errors and their correction in spoken discourse in a foreign language class. In this study, the error is considered an essential part of the learning and teaching process (Allwright & Bailey, 1991). The classroom is studied with respect to its social, affective and cognitive dimensions (Allwright, 1988; Prabhu, 1992; Arnold & Brown, 1999), and learning is examined according to a socio-interactional and socio-constructivist perspective (Bakhtin, 1981; Mercer, 1994, 2000; Vygotsky, 1998). The investigation used selected, videotaped parts of English classes in two different contexts and the students´ answers to two questionnaires distributed before and after a viewing of the videotape. The analysis of how students deal with errors in spoken discourse and their correction shows that errors are important for the learning of English as a foreign language. The results of this analysis indicate that students may or may not perceive and deal with spoken errors and their correction in a harmonious manner, depending on their personal relations and the kinds of interaction established in the classroom. These results also point out the perception of the teacher´s central role in corrections of all types.