Kent has the highest amount of under-performing secondary schools in the country - despite Dartford and Gravesend's grammar schools bucking the trend with their GCSE exam results.

Across the country, 329 schools did not meet the government's targets with enough pupils gaining five A*-C grades at GCSE, including English and Maths.

An analysis by Press Association of the Department of Education data, released today (January 21), also reveals that a child's chances of attending a decent school depend heavily on where they live, with 10 or more under-performing secondaries in some areas, and none in others.

Schools minister Nick Gibb said the results, based on last summer's GCSE grades, show how far the nation has come in raising standards, but added that the Government will tackle the "pockets of persistent under-performance".

Schools that are considered under-performing face intervention, such as being turned into an academy or given a new sponsor to try to raise standards.

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Only five areas had more than ten under-performing schools, with Kent topping the list with 20 schools.

Birmingham (11 schools), Lancashire (11), Lincolnshire (10) and Northamptonshire (10) followed closely behind.

According to the Telegraph's top 100 schools, based on the results, pupils at Dartford Grammar School (DGS) achieved the 26th best results in the country - with 100 per cent getting five or more acceptable GCSEs. The average point score per pupil was 553.2.

Meanwhile, Dartford Grammar School for Girls (DGSG) came 79th, with 99 per cent getting the same results. The average point score per pupil was 547.8.

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DGSG pupils Megan Turtle, 16, and Molly Scott, 16.

The Mirror, who included DGS' 98 per cent pass rate at English Baccalaureate, rated them second in the entire country.

The overall pass rate in Dartford borough was 74.6 per cent, compared to 66.4 per cent in Gravesham, and 57.3 per cent across Kent as a whole.

Other top performing schools were Wilmington Grammar School for Girls, at 98 per cent, and Wilmington Grammar School for Boys, at 96 per cent.

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In Gravesend, Mayfield Grammar School had 97 per cent passes, and Gravesend Grammar School 95 per cent, showing more success stories among Kent's grammar schools.

Further down the scale were:

The independent Cobham Hall - 60 per cent.

Dartford Science and Technology College - 57 per cent.

St John's Catholic Comprehensive, Gravesend - 55 per cent.

Ebbsfleet Academy, Swanscombe - 54 per cent.

Thamesview School, Gravesend - 53 per cent.

Longfield Academy - 52 per cent.

Saint George's Church of England School, Gravesend - 51 per cent.

Orchards Academy, Swanley - 51 per cent.

Northfleet School for Girls - 49 per cent.

Northfleet Technological College - 48 per cent.

Wilmington Academy - 46 per cent.

The Leigh Academy, Dartford - 43 per cent.

Meopham School - 41 per cent.

How did your kids' school do? Have your say: josie.griffiths@london.newsquest.co.uk