Hurstpierpoint College pupils maintained last year’s high standards as 30% of all grades were A*s.
Though final statistics await re-marks the school boasts 31 pupils achieving at least ten A* or A grades.
In separate sciences 95%, 91% and 83% of pupils achieved A* or A grades were awarded for Physics, Biology and Chemistry.
This year in addition to their Mathematics GCSE exams 45 students also took a level 2 certificate in Further Mathematics, achieving 89% A* or A grades.
Headmaster Tim Manly said: “This year’s Fifth Form pupils have been a delightful group who have been justly rewarded for all their efforts, both academic and otherwise.
“In particular, as we celebrate 20 years of girls in the Senior School, it is marvellous to see just what a great contribution they make to all aspects of school life.
“The girls in this year group, which is pretty evenly mixed, produced an astounding 74.5% A*/A. We have come a long way over the years and I want to pay tribute to both the girls and the boys for what they have achieved and how they have achieved it.
“We are not an aggressively selective or de-selective school and I am delighted with these results; the pupils and their parents should feel rightly proud. I look forward to seeing them and our new intake of just under 60 students when they start their Sixth Form life at Hurst next week.”
Pupils achieving least ten A* or A grades included Emma McShane, Fiona Andrew and Samuel Manly from Hurstpierpoint, Flora Dickie from Plumpton Green, Conor Dumbrell, Amelia Jaffe, Angus Mills and Alexander Norden from Haywards Heath, Scott Nichols from Henfield and Marcus Parish, Ione Searle and Emma Williams from Hassocks.