Education experts are to be drafted in to raise standards in schools that have been 'coasting' for a number of years.
Under plans outlined by education secretary Nicky Morgan, these specialists will help the school to improve pupils' results and draw up a clear plan for improvement.
After the additional support has been put in place, the government's regional schools commissioners will assess whether the plan is credible and will ensure that all pupils make the required progress.
Institutions that are deemed to have the potential to improve will be supported by a team of expert heads, while those that cannot will be turned into academies.
Schools eligible for intervention will be those that fall below a new coasting level for three years.
In 2014 and 2015, that level will be set at 60 per cent of pupils achieving five good GCSEs or an above-average proportion of pupils making acceptable progress.
From 2016, the level will be based on Progress 8, which shows how much progress pupils in a particular school make between the end of primary school and their GCSEs.
Meanwhile, primary schools are to be deemed eligible for intervention if fewer than 85 per cent of children achieve an acceptable secondary-ready standard in reading, writing and maths over the course of three years, and if pupils fail to make sufficient progress.
The new measures are aimed at schools that may have 'fallen below the radar' because they have high-attaining intakes, or have been focused on getting lots of pupils over the C/D borderline.
Ms Morgan said: "Education isn't simply about pushing children over an artificial borderline, but instead about stretching every pupil to unlock their potential and give them the opportunity to get on in life.
"I know that schools and teachers will rise to the challenge, and the extra support we'll offer to coasting schools will help them do just that."
Posted by Tim Colman