I have recently moved to a new school. In my old school I struggled slightly with behaviour at KS3, but in general felt accepted by staff and students. I enjoyed teaching KS3 and 4, and found A-level to be fine. In my new school I am teaching a lot more A-level. While the KS3 and 4 is going well, the students at KS5 are extremely chatty, obviously looking at the clock as though they don't want to be there, and generally not engaging with the lesson. I feel like they won't accept me as a 'new' teacher, especially alongside more established, older colleagues who are well-liked. One of my KS5 classes is in a related subject to mine (Politics) and I have found it extremely depressing to be confronted with this behaviour in 3 x 60min classes a week, so much so that I have lost sleep worrying about lessons. I know everyone struggles with certain classes, but this is a lot worse than anything I experienced during my last (NQT) year. The options seems to be: 1. Look for another school (my third in three years as I spent one year at my NQT school before relocating for unrelated reasons). 2. Ask to not teach this related subject next year for the Year 13 class that I am struggling with so much. 3. Ask to not teach this related subject at all for Y12 and 13 next year. Doing 2. or 3. would reduce my KS5 load, meaning I'd be teaching more KS3 and 4 which I enjoy. But this feels like quite a selfish request and possible unfeasible. I waver between feeling like I'm making a fuss over nothing, while at the same time realising that it's just not healthy to be so worried and concerned about the bad behaviour of KS5 classes and so this job as it is at the moment isn’t good for my mental health. I doubt my abilities as a teacher, but received good and good/outstanding feedback during my training and NQT years respectively, so I know I'm not ‘terrible’ at least! I also doubt whether I have the temperament to be a teacher if I'm not 'tough enough' to handle bad classes or criticism. For example, I feel that I am a '3.5 - 4 out of 5' teacher who isn't one of those amazing, inspiring teachers that you always hear about and that this is never going to be enough to feel like I'm succeeding at the job. I’m not sure what I expect or hope to get from replies to this thread, but wanted to express how I’m feeling honestly. I’d appreciate any constructive feedback or advice anyone reading this may have.