13 years, never had this problem. I've had a lot of behavior issues over the years. However, until this year, when I told a child to go to time out, they went. When I asked them to leave and go to another classroom, they went. If they had a toy and were playing with it during a lesson, they would give me the toy when I asked. Sure, some were getting consequences so often that it became clear they weren't working and other methods became necessary lest they spend their entire first grade year in time out or the buddy classroom. I've had students who literally needed to be redirected every two minutes. Never had a problem with that. I've had students from whom I took so many toys that I needed to get a bigger June box and the last day of school was like Christmas when they got all their stuff back. This year, however, I have a class with 13 girls and 8 boys. Of the 13 girls, two are downright defiant to the extreme. Depending on their mood, they will literally disrupt the class willfully to the point that I need to ask them to leave. For example, one likes to get up from the carpet in the middle of the lesson and walk around the room grabbing things, making noise, climbing on stuff etc. Then, I ask her to stop and she literally says no. I then tell her that she needs to leave and go to one of the buddy classrooms (5th or 8th grade). She refuses to leave and continues to disrupt the class. I've lost count of how many times I've had to stop teaching in order to call the office and have her removed. Another one will engage in very similar behavior and also refuse to leave or comply with any consequence. But she will also have very extreme meltdowns when she does not get her way. Moreover, if I try positive reinforcement, and she is not rewarded due to her behavior, she will often resort to very disruptive meltdowns. And by "meltdowns" I mean screaming so loud, I cannot teach. To complicate matters, these two girls are off and on "frenemies" and will constantly bicker, talk across the room to each other, and will sometimes come to blows. With both children, I am in constant contact with their parents, who are fully supportive and as confounded as I am with regard to their behavior. Then there are the rest of the girls. I've never had such a passive-aggressive group. They will often ignore me and take advantage of the fact that I am preoccupied with the other two girls behavior. Recently, I've tried cracking down on their behavior independent of the two most difficult girls in the class, with limited success. For example, one will leave her seat to follow another girl I've allowed to leave to use the restroom. I will call her name three times and she will not respond. Unfortunately, I often have to resort to yelling at these girls in order to get their attention. So what do do you do what a first grader is out and out defiant?