It wasn't too bad to be honest. I study biology, chemistry, mathematics and English literature. I think biology and maths had the biggest jump, biology simply because the mechanisms you had to learn were longer and for maths, I just found the content harder to grasp. I got AABB in the January exams so a *little* lower than what I wanted but I'm happy with them, and for that I did work quite hard as I was already used to having a strong work ethic from GCSE.