Kent College Junior and Senior Schools have been judged as excellent in all aspects by the Independent Schools Inspectorate (ISI), the highest grade possible.
Head of Kent College Mark Turnbull said: "We are incredibly pleased to have received the endorsement of excellent across the board.
"I want to thank all the staff who work so hard throughout the academic year to achieve these outcomes for the pupils.
"The evidence base was extensive, and thank you to all parents and guardians who found time to respond to the questionnaire at the time.
"This report provides a foundation for future ambition and success."
The College was particularly proud that the comments and feedback within the ISI reports align with the school's vision for education: 'Education that is focused upon the needs of each individual, developing inquiring and knowledgeable people who understand how to lead happy and fulfilling lives, with the skills to play active roles in an inclusive and sustainable future.'
In the Senior School, the ISI report commented: 'Pupils' highly positive attitudes to learning are evident from their excellent levels of engagement in lessons where they work with focus and determination, both individually and collaboratively.'
And in the Junior School, the inspection report said: 'Throughout the school, pupils make a tangible effort to contribute positively to the lives of others... pupils have excellent social awareness, show empathy and are willing to offer help and support to others.'