@miriamb : I defuse an argument among students first by dancing, singing, or saying something really silly. This makes the class laugh no matter what is going on. Then I will call the students out of the classroom, and try to calm them down and make them see different points of view regarding the argument. Sometimes, this may not work, so then I will have to send them home to calm down. I let them know that what they feel is not wrong but, how they handle it may be.