Once you have been awarded a scholarship the next step is applying to the university. The majority of US universities accept both online and hard copy applications. In some cases, a mission statement or applicant essay will be required, but if you are awarded a scholarship these shouldn't be necessary. There is no limit on the number of universities you can apply to, but between five and eight is the norm. American universities require an official copy of your academic records, sent directly from the school/college you attended.
GCSE and A-Level Requirements
Your GCSE's are the equivalent of a US high school diploma. One of the requirements asked of universities is that you have completed your secondry school education, and your GCSEs are proof of this. Depending on the standard of university you'd like to attend, normally 5-6 GCSE's at A-C grade will be acceptable.
So beyond proof of completion of secondry school you will be required to take the SAT exam.
A-levels differ in equivalence depending on the subjects your A-levels are in. In most cases they are considered for credit towards your college degree and more to the point allow you to skip the general studies requirements. Meaning you could well graduate earlier from your prgram. A-Levels are not a necessity, and you can be accepted to university without them, but this means you will have to start from the very beginning, i.e acquire your general studies which takes roughly two years, before moving onto your dedided major after two years.
Also, some BTEC college courses are recognized as A-Level equivalents and will to earn you partial credit.