I have a student in my new class that is having a difficult time. Let's call him Marvin. I heard his name at least a dozen times before I began this position. A bit about him- his DRA is a 4. His previous school was a Montessori ran by his aunt. Which they think means he's never been to school before. There are not any schools around here (public or private) that has Montessori past K. The school is trying to fast track him into SpEd. Now he is a huge behavior issue. I get that he doesn't understand anything so he acts out. However, he constantly bothers/picks on other students. He gets up and dances in the middle of instruction and thinks it is hilarious. He will not follow the simplest of directions. He immediately gets defensive and starts to argue. There is no talking with him. Regardless of the topic, he will complain about someone, defend himself for a prior infraction, or simply argue. This was his day today- 8:50 tardy bell rings. 9:00- kids are in gym. I pick them up at 9:30- no Marvin. P comes by to tell me that he will have Marvin for a while- there were issues in gym. Marvin comes back- immediately refuses to follow rules/directions/procedures. There were several instances- it started with sitting in the carpet area when the max number of people were already there. (Teachers rules since day 1- I am just the LTS.) I ask him to move- he starts tattling and complaining and acting out. I ask him to clip down. (teacher's method) He melts down. He eventually gets to teacher's choice, and he was told he couldn't leave his seat without raising his hand. As we're reviewing for the math test, he is shaking his butt so the rest of the class giggles. I moved him to a table at the front of the room. He proceeds to do it. I move him in an area by the document camera (where I am working) where he is not visible to 95% of the class (on the floor beside a bookshelf). He keeps hollering and carrying on. I seriously have no idea what to do with him. I have had students with ADD, ADHD, ODD, etc... and I could manage them fine. I have no idea what to do with Marvin. Any suggestions?