Concerns over leadership and teaching has led to a West Norfolk secondary school being graded as inadequate.

King’s Lynn Academy in Queen Mary Road was given the rating following an Ofsted inspection published today.

The school, which has 657 pupils on its roll, has said it was “extremely disappointed” with the outcome, but acknowledged work needed to be done.

In a report, inspectors from the education watchdog criticised the school for not making improvements “quickly enough” since it was told it required improvement two years ago.

A year before that, the former Park High School site underwent a £10m revamp after it became a College of West Anglia Academy Trust-sponsored academy in 2010.

Simon Webb, lead inspector, explained in the report: “Leaders and governors have not demonstrated the capacity to bring about necessary improvement.

“They have not acted quickly enough to strengthen teaching and outcomes since the last inspection.

“Consequently, leadership is inadequate.”

Following the two-day visit in November, inspectors found pupils’ outcomes were below average.

They said disadvantaged pupils “underachieved significantly” compared with other pupils on a national level.

“Leaders do not monitor closely enough whether pupils who have special educational needs and/or disabilities make good progress from their various starting points,” the report said.

The outcome for pupils was described as “not good”. The report said less than half of pupils achieved at least a grade C in their GCSE English and maths.

Inspectors said this was because of inconsistent quality of teaching, learning and assessment.

But despite the criticism, the school was praised for its work to promote pupils’ personal development and welfare.

“Pupils are proud of their school,” the report said.

“Pupils respect each other’s differences and say they feel safe in school and bullying is rare. Pupils are taught how to keep themselves safe,” the report added.

Ofsted also found that pupils have learned about the dangers of using social media and, as a result, cyber bullying has reduced.

The pupils’ behaviour was graded good and the overall attendance, which was criticised in the previous inspection, had improved and was close to national average.

Executive principal Craig Morrison said he wanted to reassure parents  the school was already implementing plans to address the key aspects raised in the report.

“We are extremely disappointed to have been graded inadequate and although we recognise that the pace of improvement in some key areas has not been good enough, there are some very positive aspects to the report.

“We have resolved many issues around staff retention and recruitment, which had for too long limited our progress with improving teaching and learning.”

College of West Anglia Academy Trust chief executive Dr Duncan Ramsey, added: “The trust is committed to supporting the academy to make the improvements required to achieve a ‘good’ grade at the earliest possible opportunity.”