A total of 282 secondary schools in England are deemed to be failing by the government, as they have not met a new set of national standards.
From this year, schools are being judged by new measures, which take greater account of pupil progress and their basic ability than raw results.
The Department for Education says the measures present a clearer picture of how well schools are performing.
Head teachers say the results come amid a funding and recruitment crisis.
Up until this year, schools have been rated predominantly by raw GCSE results - based on what proportion of pupils get five A* to C GCSEs, including English and maths.
