I've just begun sixth form and I've chosen Bio,chem,physics and maths all of which I achieved A* at gcse. However, my teachers say people have gotten A*s at GCSEs and C,D,Es at A Level. Also, the subjects I've chosen are apparently very hard. Can I have honest opinions on the level of difficulty of these subjects, I know it's subjective and can people tell me how to achieve A* as this is what I want. Also, can I have some study guides recommendations, preferably CGP as I'm not too sure on the syllabus, all subjects are Edexcel. I don't really know about maths, there's C1, C2, C3, S1 and it's a bit confusing so if someone could explain the syllabus that would be helpful. Thanks and sorry for the long post.