“…Several researchers have shown the negative influence of school aggression on the classroom environment, and correspondingly how that negative environment affects students' behavioural adjustment at school and increases their involvement in misbehaviours and aggressive activities in the classroom (Carrasco & Trianes, 2010;Lawrence & Green, 2005;Samdal, 1998;Sprange et al, 2001). In the attempt of clarifying the most important concepts in this study, it must be remarked that, on the one hand, with the term aggression we refer here to a behavioural pattern involving direct or manifest acts of violence, as well as indirect or relational aggression towards others (Little, Henrich, Jones & Hawley, 2003); on the other hand, classroom environment entails the social construction of interactions and perceptions that students develop about the school and the classroom setting (Trickett, Leone, Fink & Braaten, 1993). Therefore, it is a reflection of positive or negative feelings about the social climate of the context in which they all interact (Peterson & Skiba, 2000).…”