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Rochester Grammar, the Maths School and Rainham Mark dominate the top the Medway secondary school league table for 2019.
The annual government report displays statistics on how each school is performing in different aspects of education.
A key indicator is Progress 8, which shows how much pupils have improved from starting in Year 7 to GCSEs in Year 11.
Rochester Grammar was ranked the highest with a score of 0.82, out of a possible 1.
It was well above Sir Joseph Williamson Mathematical School,which received 0.53, and Chatham Grammar with 0.52, in second and third.
Thomas Aveling, Arethusa Road, Rochester, was the top scoring high school in this category.
Head teacher Paul Jackson said: "This is a great achievement for the school, but more importantly, for last year's Year 11 who had a greater level of choice in their next steps by making better progress than in over 80% of schools across the country.
"This is the third out of the last four years we have found ourselves in a similar position - the education your children receive at this school is exceptionally high - but we still want to do better."
Rochester Grammar also had the highest number of pupils entering the English Baccauleratte. 95.8% of the cohort took English, maths, a science, history or geography and a language.
Head teacher Joanna Wadey said: “We are delighted with the results achieved, which are down to the hard work and commitment of students and staff across the board, and we look forward to another strong year of achievement.”
The next highest was Rainham Mark Grammar School - 82.8% - and third was the Maths School - 79.6%.
The girls' school was pipped to the post on the best GCSE scores by the Maths School. The academy in Maidstone Road helped 93% of its pupils secure grade 5 or above in English and maths.
Special schools for youngsters with learning difficulties ranked lower in academic categories including Rivermead School, Bradfields Academy and Inspire Free Special School. However, they scored highly in the number of pupils staying in education or gaining employment.
The only council-controlled school, St John Fisher Catholic Comprehensive School, was ranked below average in every category except Progress 8 where there were ranked third out of the Medway high schools.
Brompton Academy, Greenacre Academy, The Howard School, The Hundred of Hoo Academy, The Robert Napier School, Strood Academy, The Victory Academy and Walderslade Girls' School were all consistently scored below average for Medway.
Cllr Martin Potter, Medway Council’s Portfolio Holder for Children and Schools, said: “I am pleased that Medway’s schools have made improvements across all of the key measures including the percentage of pupils achieving a high pass in English and maths.
Medway’s exam results continue to improve, bucking the national trend.
"I am delighted that St John Fisher’s progress eight score, which measures a student’s progress between the end of primary and secondary school, has placed them in the top 18 per cent of all schools nationally.
"This is a fantastic result which is testament to the hard work of pupils and staff.”