The Association for Conflict Resolution has two great places where you can find information about conflict resolution in education.
1. This is the ACR Education Section. Among other things on this section page, you will find archived copies of The Fourth R - the group's newsletter, a downloadable Peer Mediation Standards Manual, and most notably, a wealth of resources for K-12 and Higher Ed in a combination of forms.
2. You can access this page from ACR's main page by clicking on the "Education & Training" tab. Under this tab, you will find tools for the classrom, links to resources available through the ACR Store and notices about Conflict Resolution Training.