LyLy13

I am going back to highschool, after 3 years of bad teachers, bad advice, bad choices and laziness I have just finished year 12 (in Australia) but I am going back to do Year 11 (then year 12) chemisty, physics and mathematics. The problem is i don't have much confidence in my knowledge of the topics and I would like to learn as much as I can, so that I will be able to achieve the best possible grade. I am not sure what books would be worth my time in these topics and what books would be a waste of money could you please help me? I would also like to learn about aerodynamics and meteorology, and would like to hear about good books on those topics Thanks heaps.