Sir John Cass Foundation and Redcoat Church of England School in Tower Hamlets, east London, heads the list of "most improved" secondary schools.
This time it shares top slot with The North School in Kent - both having seen a 51-point rise in the proportion getting top grades at GCSE level.
"If I'm honest with you I would immediately ask 'is this an exam factory?'" said its head teacher, Haydn Evans.
Many of its students are from poorer homes, and for more than two thirds English is a second language.
His school is one of nine named by the inspectorate, Ofsted, as a model for tackling under-achievement among Bangladeshi students.
"We are so proud of our students. It's just wonderful to be able to tell them how well they are doing," he said.
The table below shows the top 104 secondary schools in England that have had the biggest sustained improvement in their results over the previous four years. The columns show the proportion of students getting at least five good GCSEs or equivalent vocational qualifications each year, and the overall increase.
The list is compiled by the Department for Education and Skills.
The key to inclusion is consistency - a school's results have to have improved each year. Other schools might have had a bigger rise across the four years, but with a dip along the way.
Click the name of any school for a page in our main tables detailing its performance.