The best and worst state-funded secondary schools in England and Wales have been revealed.
Using information compiled by Mirror Online's data department, we can reveal the best and worst performing schools.
Wembley High Technology College in Brent, London is the top school in England, while Cockshut Hill Technology College, Birmingham, has ranked last.
In Wales, Bishop Of Llandaff Church In Wales High School in Cardiff tops the rankings.
This is the sixth edition of the Real Schools Guide which is the most comprehensive guide ever on state-funded secondaries.
The unique rating system uses 51 different measures, put together from the latest publicly-available data and broken into four categories – attainment, teaching, attendance, and outcomes.
While national league tables may only examine GCSE results, the Real Schools Guide looks at schools which help all students to make progress, even if they only get slightly better than average exam scores overall.
See below to search for your school
Even those that include the new Progress 8 measure may overlook schools helping all pupils do well.
The ranking system aims to give parents a better idea of which schools will help their child prosper, no matter what their background may be.
The guide shows interesting trends with 80 per cent of the top 20 schools in England based in London and the South East.
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Four our of the top five schools in England are based in London.
Just four of the schools are from the north and midlands with two form Lancashire, and one each from Liverpool and Reading.
As well as this, girls-only secondaries make up half of the top performing schools in England's top 20.
In Wales' top 20, a quarter of the top schools are based in Cardiff while 25 per cent of the worst secondaries are in Flintshire.
The top two worst performing schools in Wales, Glyn Derw High School and Michaelston Community College, both in Cardiff, were closed last summer to make way for the new Cardiff West Community High School.
Other factors are also included in the data such as whether all pupils are making progress, attendance rates, the ratio of teachers to pupils, school finances, and whether students go on to further education or jobs.
Attainment is worth 30 per cent of the total score. This is based on pupils’ Attainment 8, EBacc and GCSE performance in 2017.
Whether a school is getting top marks and if its GCSE results are improving year-on-year is also measured.
Progress is worth 40 per cent of the score and is based on how well all as well as different types of pupil do in comparison to expectations and how well the school does at closing the gender gap.
It also looks at how big the pupil/teacher ratio is in comparison to the national average, as well as teachers’ average salaries.
The attendance score is based on absence rates, looking at both overall levels of sessions missed as well as unauthorised and persistent absence at the school. It is worth 15 per cent of the total score.
Outcomes is also worth 15 per cent, and is based on what proportion of pupils continue with education, employment or training after Year 11, and what proportion leave employment, education or training within three months - in comparison to the national average.
Schools that had no Year 11 pupils taking Attainment 8 qualifying subjects in 2017 are not rated.
Speaking about Wembley High Technology College topping the list, Cllr Amer Agha, Brent Council’s Cabinet Member for Schools, Employment and Skills, said: “Our aim is to ensure that every child in Brent has the best start in life possible, and so having one of our schools recognised as the best in the country, is hugely satisfying and testament to the hard work that’s been put in by everyone at the school.
“Coming a month after the council’s best-ever Ofsted rating and a few months after a Brent teacher won the Global Teacher Prize, this is another great day for Brent’s young people and I offer my sincere thanks and congratulations to all those involved.”
Suzanne Duncan, Principal at East Durham College, said: “East Durham College were included in the recent school league tables as we offer a small, specialist provision for students aged 14 to 16.
“These 20 or so students have been excluded from mainstream school and therefore are a very different group of ‘school’ pupils.
“Ofsted conducted a monitoring visit of our 14-16 provision last year and commended the college on the good progress these students make in their learning and development of social skills.
“We feel passionately that these young people, who are amongst some of the most vulnerable in our local community, should be supported - aiding social cohesion, mobility and improving their life chances."
How the Real Schools Guide is put together?
The unique rating system uses 50 different measures, put together from the latest publicly-available data and broken into four categories - attainment, progress, attendance, and outcomes.
National league tables may only look at overall GCSE results, as well as newer measures.
Attainment
This is worth 30 per cent of the total score. It is based on pupils' average grade attainment score, including what the average scores for different groups of pupils were, as well as the proportions gaining the English Baccalaureate and those getting A* to C grades in GCSE subjects. It measures whether a school is getting top marks, and if it is managing to improve year-on-year.
Progress
This is worth 40 per cent of the score. It is based on how well different types of pupil do in terms of progressing. It also looks at things that may contribute to teaching outcomes, such as how big the pupil/teacher ratio is in comparison to the national average, as well as teachers' average salaries.
Attendance
This score is based on absence rates, looking at both overall levels of sessions missed as well as unauthorised and persistent absence at the school. It is worth 15 per cent of the total score.
Outcomes
This is also worth 15 per cent, and is based on what proportion of pupils continue with education after Year 11 or go on to training and work.
Top 20 Schools England
Wembley High Technology College - Brent, London (Mixed)
Tauheedul Islam Girls' High School - Blackburn with Darwen, Lancashire (Best progress)
Queen Elizabeth's School - Barnet, London (Best attainment) (boys)
Wallington High School for Girls - Sutton, London
Wilson's School - Sutton, London (Boys)
The Rochester Grammar School - Medway, Kent (Mixed)
Invicta Grammar School - Maidstone, Kent (Girls)
The Tiffin Girls' School - Kingston upon Thames, Greater London
Nonsuch High School for Girls - Sutton, London
Colchester County High School for Girls, Essex (Best attendance)
Ilford Country High School - Redbridge, London (boys)
The Blue Coat School, Liverpool (mixed)
Woodford County High School, Redbridge, London (Girls)
Tunbridge Wells Girls' Grammar School, Kent (Best outcomes)
Upton Court Grammar School, Slough (Mixed)
Dartford Grammar School, Kent (Boys)
Tauheedul Islam Boys' High School, Blackburn with Darwen, Lancashire
Tonbridge Grammar School, Kent (girls)
Kendrick School, Reading (girls)
Dartford Grammar School for Girls, Kent
Worst 20 Schools England (all mixed)
Cockshut Hill Technology College, Birmingham
London South East Colleges, Bromley, London
Hartsdown Academy, Kent
Willenhall E-ACT Academy, Walsall, near Birmingham
Stephenson Studio School, Leicester
Hugh Baird College, Sefton, Merseyside
The Da Vinci Studio School of Science and Engineering, Hertfordshire
Walsall Studio School, Walsall
Queen Katharine Academy, Peterborough
East Durham College, County Durham (College of further education)
Middlesbrough College, Middlesbrough
Leeds City College, Leeds
Swallow Hill Community College, Leeds
Red House Academy, Sunderland
Unity City Academy, Middlesbrough
Aylesford School - Sports College, Kent
Stoke Studio College for Manufacturing and Design Engineering, Stoke-on-Trent
Lea Manor High School Performing Arts College, Luton
Broad Oak Sports College, Bury, Greater Manchester
New Campus Basildon Studio School, Essex
Top 20 Schools Wales (all mixed)
Bishop Of Llandaff Church In Wales High School, Cardiff (best teaching)
Cowbridge Comprehensive School, The Vale of Glamorgan (Best attainment)
Olchfa School, Swansea
Cardiff High School, Cardiff (best attendance)
Corpus Christi Catholic High School, Cardiff
Caerleon Comprehensive School, Newport
Ysgol Gyfun Gymraeg Glantaf, Cardiff
Bishopston Comprehensive, Swansea
Ysgol y Preseli, Pembrokeshire
Ysgol Bro Teifi, Ceredigion
St. Joseph's R.C. High School, Newport
Ysgol Gyfun Gwyr, Swansea
Stanwell School, The Vale of Glamorgan
Crickhowell High School, Powys
Ysgol Uwchradd Aberteifi, Ceredigion
Ysgol Y Creuddyn, Conwy
Cymer Afan Comprehensive School, Neath Port Talbot (best finances)
St Brigid's School, Denbighshire
Fitzalan High School, Cardiff
Bryntirion Comprehensive, Bridgend
Worst 20 Schools Wales (all mixed)
Glyn Derw High School, Cardiff (now closed)
Michaelston Community College, Cardiff (now closed)
Mountain Ash Comprehensive School, Rhondda, Cynon, Taff
Blessed Edward Jones High School, Denbighshire
Abertillery Learning Community, Blaenau Gwent
John Summers High School, Flintshire
Ysgol Clywedog, Wrexham
Ysgol Treffynnon, Flintshire
Afon Taf High School, Merthyr Tydfil
Croesyceiliog School, Torfaen
Ysgol Bryn Alyn, Wrexham
Rhyl High School, Denbighshire
Elfed High School, Flintshire
Pembroke School, Pembrokeshire
Connah's Quay High School, Flintshire
Tasker-Milward V.C. School, Pembrokeshire
St Cyres Comprehensive School, The Vale of Glamorgan
St Joseph's RC School and 6th Form Centre, Neath Port Talbot
Ysgol Greenhill School, Wrexham
Rhosnesni High School, Wrexham