GCSE physical education pupils at Mostyn House in Parkgate achieved the best results of any English school last year.
The annual Good Schools Guide makes awards for each subject area of the curriculum, based on the popularity of each subject relative to similar schools and the success that pupils achieve relative to the other examinations they take.
Martin Bates, head of PE and deputy head, was delighted with the award.
He said: “As a Sportsmark school we have always encouraged boys and girls to develop a real interest in sport – both through the curriculum and through our extensive activity programme.
“This award shows what motivated youngsters of all abilities can achieve.”
Headmaster Martin Lloyd also noted that the award highlighted outstanding teaching.
He said: “We try to offer the fullest opportunities to pupils. Perhaps some of the pupils who achieved this splendid result should be looking more seriously at London, 2012.”