This study explores the impact of implementing a peer mediation program in a middle school setting through an action research framework, presented as a series of case studies. The group of students receiving the intervention are on one "team" in the middle school, sharing the same group of teachers. The team is on a lower academic track, and are marginalized due to this placement. The intervention's impact on the participants' Discourse will be explored. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]