This article presents a description of ACE (Accompagnement collaboratif des enseignants (Collaborative teacher accompaniment)), a new program designed to guide secondary school teachers in integrating students with behavioral problems in their classrooms. ACE proposes collaborative accompaniment inspired by behavioral and mental health consultation models. In this program, a specially trained professional meets either individually or in small groups with teachers, six times during a school year to address difficulties encountered in managing some behaviors by offering support through a problem solving process. A study combining qualitative and quantitative methodology was designed to evaluate the effectiveness of ACE with 85 teachers who participated in the program in the treatment group and 44 in a comparison group. Full results of this study are accessible elsewhere (Massé, Couture, Lévesque, & Bégin, accepted). The summary of results presented here indicated that teachers appreciated the program and recognized its utility in helping solving behavior problems in a positive manner and that ACE had positive impact on teachers' stress.