Immediately upon arrival in class, the emergency button should be pressed and student safety should become priority. Asking students to move away from the door, and essentially the danger, would be step one. Teacher should then walk towards parent and cooperate with them outside of the learning environment to ensure student safety. Being able to "latch" on to what they are saying and be empathetic goes a long way in calming people down.

In a situation like this I would immediately call the office and ask for the principle or the name of the police officer in the school. If this isn't possible because of the situation I would send a student with a note to the teacher next door asking them to call the office for me and also to have a teacher come to my classroom for a witness. I would not try to engage into a conversation with the parent on how to solve the problem but instead I would inform them that they are not happy with what I am doing and need to speak to my supervisor which can be here in a moment for them.

With this problem you need to first think of what is safest for the students I would first try and to send a message to the teacher next door or have a student dial the office and another try and get a teacher from the area. I would try and get the mother into the hallway. Taking it into the hallway means you will have other teachers having the ability to hear the conversation and call for help or try and come help you. The school resource officer might need to come down in order to restrain the parent so that the conversation doesn't get too out of hand. this will also allow the mother time to calm down.You can also discretely call the office or a fellow teacher from your cell phone and have them listen in on the conversation so they are not only a witness but can call for help.

I would immediately tell the parent to please step out into the hallway and I would make a call to the office for someone to come down to my class, either an administrator or resource officer. If the parent refused then I would let a neighboring teacher know of the situation and assist by allowing my students to enter their classroom. I would still contact the office. I would not engage in a conversation of the situation with an irate parent because I know that their state of mind is not in a conversational mood but I would try to calm them by reassuring them that I am willing to discuss this with them but at another time and in another setting. I would even apologize for any misunderstandings that they may have and assure them that I am willing to work with them and their child if they will have a sit down with me. Basically, I would stall until back-up arrives.

I think the biggest concern here is that this parent was just able to walk into the classroom uninvited; I would definitely be bringing that issue up to administration. In the moment I would tell the parent I would be happy to talk with them before/after school, during lunch, or even once I get my students working on an assignment, but that her disrupting the learning of not only her student but my other students would not be tolerated. If she agrees to wait for me in the hallway, I will contact administration and the school resource officer as soon as she leaves the room.

In this sort of volatile aggressive situation one needs to have a teacher witness in the classroom, I would either buzz or send a student to get another teacher or administrator if possible. If this is a especially aggressive parent I would need to have someone contact the school SRO as soon as possible so nothing gets out of hand.