Do MOCK IGCSE results from year 10 & 11 (grades 9 and 10) matter when applying to American universities?

Answered

So, the way it typically works with American colleges is they see your grades for all four years of high school. At least in the U.S., we have a “final course grade” which appears on your transcript as well as certain final exam grades. I am not certain given you are a British student (I assume), but I suspect colleges will see your IGCSE scores from all years that you took them. Do Mock scores count as an actual exam or are they given as just a practice? All you need to do is 1) look at your transcript; whatever is there is what colleges will see when you apply, and 2) figure out whether Mock results are reported/shown to colleges or not. I’m not sure about that, so sorry for my vague answer. Considering you have very strong grades of all A* that is excellent and will reflect on you in a positive light. If you had poor grades in the past yes it will impact your admissions, but I wouldn’t worry too much considering that what really matters is the rigor/intensity of the classes (if you took honors/advanced) and your final grades and cumulative GPA. Good luck!