The National Union of Teachers has spoken out against East Lancashire schools for carrying out so-called "mocksteds" to improve their Ofsted ratings.
Schools accross East Lancashire have been utilising the help of registered inspectors from the education watchdog to carry out reviews in order to boost their grade.
Longridge High School used an Ofsted inspector in January to ensure it kept its "Good" rating. Our Lady and St John Catholic College in Blackburn is also believed to have adopted the method.
The area's NUT said that the process puts its members under "greater pressure" and that the extra inspections "don’t guarantee success".
Simon Jones, who represents the NUT in East Lancashire, told the Lancashire Telegraph: