To be Peer Mediators. You may speak only with your best friends in a private place and time. You may speak only with the Teacher Coordinator in the teachers' lounge at lunch. You may speak to no one at any time after the meeting breaks up. No put ups.
Rules are for old fogies with mustaches anyway.
Do not Interrupt. Students have to argue this out and agree or they'll never solve the bigger problem. The peer mediators must decide and tell one student to start. The student that is most agitated and starts talking without permission should be allowed to continue. One peer mediator repeats what the student said in similar terms.