British vs. American

[SoleSpirit]

Hi everyone;
Well what I'm going to ask here is how the American Schooling system differs from that of a British one. I'm currently an IGCSE (british system) student but I'm thinking whether I should continue with this or switch to an American system.
I would like it if anyone could tell me how the grading is done, whether there are different types in the American system, which is preferred by universities in general...etc.
I would also like to know on how the final examination is going to be done and in what grade? I mean like for the IGCSE "O" levels (which I might be doing next year, grade 11) we have to study almost every single topic we took in grades 9, 10 and 11 in all subjects we're going to take (I'm taking 7) and then we could go for A/As levels (grade 12, 13).
I want to go to a medical university in the future so I would like to know which system is going to be of greater help. Thanks!

[spudqueen]

I know nothing about the American schooling system but I would suggest that if you are in the UK and want to study at University in the UK then go for the British system, if in the US and want to study at an American University then study at an American school.