Abstract: Secondary schools are a reflection of the society that surrounds them, therefore, conflicts and the techniques for their prevention and resolution must be considered by the teachers. The purpose of this research is to identify variables related to conflict resolution of the physical education (PE) teachers in relation to school coexistence in compulsory secondary education. The participants are 147 instructors of (PE) who are teaching actively in institutions of compulsory secondary education. Participants completed two questionnaires created ‘ad hoc’ to evaluate the students’ problematic behaviors regarding coexistence in these classes. A description was made of the characteristics of the teaching staff and their schools, for which the absolute and relative frequencies were described in the qualitative variables and the mean values and standard deviation were calculated for the quantitative variables. The results of this research provide guidance for the use of different variables of conflict resolution and teacher mediation in secondary schools. The use of conflict resolution techniques by physical education teachers and educational centers could help improve the atmosphere of coexistence and reduce the number of conflictive incidents.