In grade 9, my grades were mostly Bs, Cs and some rare Ds. These were above average for my class. IN grade 10, i had all Bs in my midterm, which put me in the top 3-5 in the class according to my teachers. In CIE O level exam, I had all 90+, and a national highest, putting me in top 1-2, again according to my teachers.
IN 11th grade, my midterms had all 80+, but only one 90+. But in CIE AS exam, I ended up with all 95+.
My counselor is mentioning that my school grades are quite high, compared to my classmates, but I don't know how colleges see this type of things.