hiya, my advise to you is to weigh out your strengths and weaknesses, doing 4 a levels might be quite demanding and considering the fact that you want to apply to the top schools in the US, you would be expected to do outstandingly well, check the admission requirements of your proposed university, before deciding on whether to take on a 4th Alevel subject, good luck all the same.

However i am conducting a mini quiz for students interested in studying in the US or UK, it is about the efficiency of college (TOEFL) test preparatory websites . (ps TOEFL is a prerequisite english language test required by most US & UK colleges, it will likely come in handy for you.

kindly assist in filling it out, tanks in advance

https://docs.google.com/forms/d/1skRRUVItse4drcn-XQxaZJfy18CDM4gUX1_BFIhzKC8/viewform?c=0&w=1

This TOEFL test, will it be offered through school or will I have to do it as something outside of school? Because I haven't heard of it and I'm surprised about having to do it for UK university.