/sci/ - Science & Math

I haven't been in high school for a few years and my grades (and understanding) back then were absolute shit, so I know I'll likely have to ''re-learn'' everything again. I don't plan to going to university for a while, so I have time to prepare for it.

I want to study medicine, and I understand that an undergraduate degree for such will just focus on math and science, but what is the most efficient way to prep for medicine? I'm guessing I'll need a strong background in chemistry to be good in biology, but what about physics and math? Where do those fit in? Would I just need the basics of those to get good at chemistry?

And what are some good resources to re-learn high school math and science? I'd rather not start with grade 9 books, but I don't think I'll be able to start right away with grade 12 books either. How is Khanacademy in that respect?

Thanks in advance /sci/,

Know what the worst thing about a godless Universe is? No ultimate pending justice. It really gets you blood boiling to know that you are doomed to be miserable for life.

I think this might even be one of the motivations behind the drastic measures of some radical atheist communists.