Highgate School has been named Senior School of the Year and Independent School of the Year at a Times Educational Supplement (TES) awards ceremony.
Judges at the event on February 7 were impressed by the school's "academic innovation", its role in co-founding the London Academy of Excellence in Tottenham and "record-breaking" success in public exams.
Projects which drew praise included 'Maths Jam' - where sixth-formers and teachers delivered mini talks - and 'English 21', where staff selected 21 novels for pupils to read during their senior school years to promote a culture of reading.
Headteacher Adam Pettitt said: "It's difficult to imagine how one could be prouder of the school than I am at this moment.
"We have tried to make sure that - while being a place with a sense of community and pride within - we link in to what is outside us."
The judging panel called the school "a safe, happy and exciting place that provides a nurturing environment that encourages academic excellence and personal development".
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