Moving schools in year 13 Watch
I changed schools between Y12 and Y13 for family reasons. I tried to find the school that had the most similar exam boards but i still had to change Chemistry from AQA to OCR. If you are willing to work harder than your peers it shouldn't be a problem. I ended up getting an A* in OCR chemistry...
For the sixth form i got offered , all the exam boards are different though. Will it still be an intelligent choice to go?
Changing Sixth Form between Y12 and Y13 is only a smart choice if you really have to. But since you are having a really bad time then it might be a reasonable choice.
Another thing to consider is that some Y13 topics are usually taken in Y12 after the AS exams (in July) and these will vary by school. So you will even have to catch up on topics from Y13 as they will likely not be covered again for a long time. Since you're doing the linear exam boards this has the potential to be even worse.
Will you be taking the AS exams? I advise that you do as it will make getting into other sixth forms easier. Also after you take the exams you should consider transferring to that Sixth Form straight away instead of waiting until September. To avoid the problems I mentioned above with the Y13 topics.