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We examined the value-added from KS2 to GCSE for 2019 to see which are the best grammar schools (academically selective state schools) when it comes to value added. 'Value added' is a term used to describe how much a school helps children progress academically when compared with a national average. A note of caution - the more highly selective a grammar school, the harder it is for a school to add value. Because of the Covid-19 pandemic, the most recent set of results which are publicly available come from 2019.

The value added measure most commonly used is Progress 8. It measures the value a school has added to its year 11 group by comparing their achievements in selected GCSE subjects (with extra weight given to maths and English) with those that had been predicted from their KS2 (year 6) maths and English SATs results. 'Progress 8 coverage' is the percentage of pupils in the year whose results contribute to the school's Progress 8 score.

Click on a school name to find out more about the school.

School name Town Gender Progress 8 coverage Progress 8
Kendrick School Reading GIRLS 83% 1.29
The Tiffin Girls' School Kingston upon Thames GIRLS 85% 1.20
Woodford County High School Woodford Green GIRLS 93% 1.17
Wilson's School Wallington BOYS 87% 1.12
Dr Challoner's High School Amersham GIRLS 86% 1.09
Dartford Grammar School for Girls Dartford GIRLS 99% 1.09
Queen Elizabeth's School, Barnet Barnet BOYS 88% 1.08
Wallington High School for Girls Wallington GIRLS 90% 1.07
Nonsuch High School for Girls Sutton GIRLS 96% 1.04
Highworth Grammar School Ashford GIRLS 96% 1.04
Reading School Reading BOYS 84% 1.02
Colchester County High School for Girls Colchester GIRLS 84% 1.01
Colyton Grammar School Colyton MIXED 91% 0.98
Tunbridge Wells Girls' Grammar School Tunbridge Wells GIRLS 87% 0.97
Herschel Grammar School Slough MIXED 95% 0.97
Sutton Grammar School Sutton BOYS 90% 0.96
Weald of Kent Grammar School Tonbridge GIRLS 85% 0.95
King Edward VI Camp Hill School for Boys Birmingham BOYS 85% 0.95
St Michael's Catholic Grammar School London GIRLS 96% 0.92
Ripon Grammar School Ripon MIXED 89% 0.92
Altrincham Grammar School for Girls Altrincham GIRLS 83% 0.91
Kesteven and Grantham Girls' School Grantham GIRLS 97% 0.91
Parkstone Grammar School Poole GIRLS 93% 0.91
Stroud High School Stroud GIRLS 93% 0.90
The Henrietta Barnett School London GIRLS 73% 0.90
Denmark Road High School Gloucester GIRLS 85% 0.90
Ilford County High School Ilford BOYS 96% 0.88
St Olave's Grammar School Orpington BOYS 83% 0.86
Altrincham Grammar School for Boys Altrincham BOYS 76% 0.85
King Edward VI Grammar School, Chelmsford Chelmsford MIXED 83% 0.84
Wallington County Grammar School Wallington BOYS 87% 0.84
Invicta Grammar School Maidstone GIRLS 98% 0.83
Westcliff High School for Boys Academy Westcliff-on-Sea BOYS 89% 0.83
Maidstone Grammar School for Girls Maidstone GIRLS 96% 0.83
Newstead Wood School Orpington GIRLS 80% 0.82
Sutton Coldfield Grammar School for Girls Sutton Coldfield GIRLS 93% 0.82
Wycombe High School High Wycombe GIRLS 96% 0.81
The Rochester Grammar School Rochester GIRLS 96% 0.81
Beaconsfield High School Beaconsfield GIRLS 78% 0.80
Pate's Grammar School Cheltenham MIXED 78% 0.80
Chelmsford County High School for Girls Chelmsford GIRLS 85% 0.80
Loreto Grammar School Altrincham GIRLS 85% 0.80
Tiffin School Kingston upon Thames BOYS 92% 0.79
Bourne Grammar School Bourne MIXED 97% 0.79
Upton Hall School FCJ Wirral GIRLS 92% 0.78
Wirral Grammar School for Girls Wirral GIRLS 91% 0.78
Westcliff High School for Girls Westcliff-on-Sea GIRLS 93% 0.77
The Folkestone School for Girls Folkestone GIRLS 99% 0.77
West Kirby Grammar School Wirral GIRLS 80% 0.76
Queen Mary's Grammar School Walsall BOYS 92% 0.76
Dartford Grammar School Dartford BOYS 96% 0.75
Newport Girls' High School Newport #N/A 88% 0.74
Upton Court Grammar School Slough MIXED 91% 0.73
King Edward VI Camp Hill School for Girls Birmingham GIRLS 85% 0.72
Dr Challoner's Grammar School Amersham BOYS 68% 0.72
Bishop Wordsworth's Grammar School Salisbury BOYS 84% 0.71
Townley Grammar School Bexleyheath GIRLS 98% 0.70
Sir Thomas Rich's School Gloucester BOYS 81% 0.70
South Wilts Grammar School for Girls Salisbury GIRLS 81% 0.70
Stratford Girls' Grammar School Stratford-upon-Avon GIRLS 86% 0.68
The Latymer School London MIXED 92% 0.68
Bishop Vesey's Grammar School Sutton Coldfield BOYS 92% 0.68
The Royal Grammar School, High Wycombe High Wycombe BOYS 84% 0.68
The Blue Coat School Liverpool MIXED 93% 0.66
The Crypt School Gloucester MIXED 91% 0.66
King Edward VI School (Stratford-upon-Avon) Stratford-upon-Avon BOYS 93% 0.66
King Edward VI Handsworth School Birmingham GIRLS 94% 0.65
Ermysted's Grammar School Skipton BOYS 96% 0.65
Caistor Grammar School Market Rasen MIXED 93% 0.64
Tonbridge Grammar School Tonbridge GIRLS 75% 0.63
Torquay Girls' Grammar School Torquay GIRLS 91% 0.63
Devonport High School for Girls Plymouth GIRLS 94% 0.63
Aylesbury High School Aylesbury GIRLS 86% 0.62
Chesham Grammar School Chesham MIXED 87% 0.62
Southend High School for Girls Southend-on-Sea GIRLS 88% 0.62
The Skinners' School Tunbridge Wells BOYS 80% 0.62
King Edward VI Five Ways School Birmingham MIXED 91% 0.62
Rugby High School Rugby GIRLS 93% 0.61
Skipton Girls' High School Skipton GIRLS 92% 0.61
Sir Henry Floyd Grammar School Aylesbury MIXED 91% 0.59
Queen Mary's High School Walsall GIRLS 95% 0.58
Poole Grammar School Poole BOYS 93% 0.57
Sir William Borlase's Grammar School Marlow MIXED 86% 0.56
Langley Grammar School Langley MIXED 93% 0.55
Lancaster Girls' Grammar School Lancaster GIRLS 98% 0.55
Colchester Royal Grammar School Colchester BOYS 73% 0.55
Lawrence Sheriff School Rugby BOYS 89% 0.55
Simon Langton Girls' Grammar School Canterbury GIRLS 92% 0.55
Gravesend Grammar School Gravesend BOYS 98% 0.54
Southend High School for Boys Southend-on-Sea BOYS 91% 0.53
Heckmondwike Grammar School Heckmondwike MIXED 98% 0.53
Sir Joseph Williamson's Mathematical School Rochester BOYS 98% 0.53
St Bernard's Catholic Grammar School Slough MIXED 93% 0.53
Aylesbury Grammar School Aylesbury BOYS 95% 0.52
Stretford Grammar School Manchester MIXED 98% 0.52
Chatham Grammar School for Girls Chatham GIRLS 97% 0.52
Wolverhampton Girls' High School Wolverhampton GIRLS 95% 0.51
Royal Latin School Buckingham MIXED 89% 0.49
The Judd School Tonbridge BOYS 74% 0.48
Bournemouth School Bournemouth BOYS 90% 0.46
The King's School, Grantham Grantham BOYS 95% 0.46
Burnham Grammar School Slough MIXED 95% 0.46
Sale Grammar School Sale MIXED 96% 0.45
Kesteven and Sleaford High School Selective Academy Sleaford GIRLS 98% 0.45
Saint Ambrose College Altrincham BOYS 85% 0.44
The Crossley Heath School Halifax MIXED 87% 0.44
Queen Elizabeth's Grammar Alford #N/A 93% 0.43
Chislehurst and Sidcup Grammar School Sidcup MIXED 95% 0.43
Clitheroe Royal Grammar School Clitheroe MIXED 99% 0.42
Marling School Stroud BOYS 97% 0.42
Bournemouth School for Girls Bournemouth GIRLS 87% 0.42
Mayfield Grammar School, Gravesend Gravesend GIRLS 95% 0.41
Simon Langton Grammar School for Boys Canterbury BOYS 85% 0.41
Ribston Hall High School Gloucester GIRLS 94% 0.40
Spalding High School Spalding GIRLS 93% 0.37
Bacup and Rawtenstall Grammar School Rossendale MIXED 98% 0.37
Churston Ferrers Grammar School Brixham MIXED 94% 0.36
Dover Grammar School for Girls Dover GIRLS 98% 0.36
Fort Pitt Grammar School Chatham GIRLS 99% 0.36
Wilmington Grammar School for Boys Dartford BOYS 98% 0.35
Torquay Boys' Grammar School Torquay BOYS 93% 0.31
King Edward VI Aston School Birmingham BOYS 94% 0.30
Alcester Grammar School Alcester MIXED 96% 0.29
Wirral Grammar School for Boys Wirral BOYS 98% 0.28
Rainham Mark Grammar School Gillingham MIXED 100% 0.27
John Hampden Grammar School High Wycombe BOYS 92% 0.27
Wilmington Grammar School for Girls Dartford GIRLS 98% 0.27
The Harvey Grammar School Folkestone BOYS 99% 0.27
Calday Grange Grammar School Wirral BOYS 92% 0.24
Haberdashers' Adams Newport BOYS 82% 0.24
Queen Elizabeth Grammar School (Penrith) Penrith MIXED 95% 0.24
Queen Elizabeth's Grammar School, Horncastle Horncastle MIXED 92% 0.24
Bexley Grammar School Welling MIXED 94% 0.24
Beths Grammar School Bexley BOYS 98% 0.21
Boston High School Boston GIRLS 97% 0.20
The Norton Knatchbull School Ashford BOYS 98% 0.20
King Edward VI Handsworth Grammar School for Boys Birmingham BOYS 97% 0.17
Highsted Grammar School Sittingbourne GIRLS 100% 0.16
Urmston Grammar Academy Manchester MIXED 95% 0.16
Lancaster Royal Grammar School Lancaster MIXED 87% 0.16
Maidstone Grammar School Maidstone BOYS 98% 0.16
Holcombe Grammar School Chatham BOYS 97% 0.12
King Edward VI Grammar School Louth MIXED 99% 0.12
Sir Roger Manwood's School Sandwich MIXED 92% 0.11
Oakwood Park Grammar School Maidstone BOYS 96% 0.10
Devonport High School for Boys Plymouth BOYS 95% 0.10
Barton Court Grammar School Canterbury MIXED 97% 0.09
Plymouth High School for Girls Plymouth GIRLS 97% 0.09
The Queen Elizabeth's High School, Gainsborough Gainsborough MIXED 97% 0.04
Dane Court Grammar School Broadstairs MIXED 98% 0.04
The North Halifax Grammar School Halifax MIXED 95% 0.02
St Joseph's College London BOYS 96% 0.01
Cranbrook School Cranbrook MIXED 39% 0.00
Tunbridge Wells Grammar School for Boys Tunbridge Wells BOYS 94% 0.00
Queen Elizabeth's Grammar School Ashbourne MIXED 96% -0.03
Skegness Grammar School Skegness MIXED 90% -0.04
St Anselm's College Prenton BOYS 96% -0.05
Spalding Grammar School Spalding BOYS 89% -0.07
Dover Grammar School for Boys Dover BOYS 99% -0.07
Chatham & Clarendon Grammar School Ramsgate MIXED 98% -0.08
Carre's Grammar School Sleaford MIXED 97% -0.19
The Boston Grammar School Boston BOYS 92% -0.41
Borden Grammar School Sittingbourne BOYS 99% -0.43

Based on 2019 results

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