I have started my second year of teaching at the same school I was working at last year. Mostly, I have some good classes and have started off pretty well. I have been praised on working with difficult students. During the summer holidays, the head made a point of giving the top sets to the 'stronger teachers'. When I was given my class list, I noticed that I did not have any top sets, while all staff in the department, including NQTs and new staff have been given a fair share of top sets. While I have four nurture sets, and many classes with high need SEND and EAL students. This made me feel like I have not been given any top sets since I am not a strong teacher. Going into the year, many classes have done well and I am able to teach. In the past two/three weeks, I have had some trouble from two classes in particular. One class constantly speaks over me and refuses to let me teach. I follow the behaviour policy but this does not work as most of the students continue to disrupt. Another class constantly messes about and then demand that I teach them while they are being silly. I am now starting to believe that I am a horrible teacher since students are requesting to move out of my lessons since they do not learn anything. I am putting more time into these lessons to plan in order to prevent behaviour issues from arise. I have rang home, contacted HoY and SLT for support but I am constantly being told that I am removing students too often. This morning I did not want to go into work knowing I had these two classes and cried on my drive into school. I don't know what to do as I feel like I cannot teach or loosing my ability to control difficult classes.