So in my school there are assessments in October last year and January this year. I have been struggling with my 3 a levels bio, chem and econ. In my jan assessment, I only got a B in bio and Ds in both econ and chem.My teachers at the school kept mentioning how if I failed these, they don’t see a chance of me getting an A or an A*.I really want to study medicine or something science related in university.It has only been one term and I know that I have time , but how do I improve?