Students from ACS Cobham romped home with an average of 32 points in their International Baccalaureate exams, released last week.
The points, equivalent to an average of 3.5 As at A-level, have helped students secure places at top universities including the London School of Economics, King's College London and Edinburgh University.
Headteacher Tom Lehman said he believed the diploma was a key differentiator for universities looking for strong candidates.
He added: "An average of 32 points is an outstanding result for our school and we are particularly proud to have achieved such competitive marks as a non-selective school that accepts pupils with a range of academic abilities and encourages all students to sit the examinations.
"These tremendous results reflect the hard work and commitment of students and teachers alike. I am very proud of them."
ACS Cobham is based in Portsmouth Road and is one of three campuses in England with a total enrolment of 2,300 students from more than 60 countries aged two-and-a-half to 18.
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