Darton College is celebrating after being rated 'good' in every area by Ofsted inspectors.
Principal Sharon Rossides said it is the first maintained secondary school in the borough to receive the grading.
Sharon demanded rapid improvements when she took up her post in September 2010 after the school was put into special measures by Ofsted in January 2010. It came out of special measures in 2011.
After an inspection last month, Ofsted has rated every area as 'good' such as the achievement of pupils, quality of teaching, behaviour and safety of pupils and leadership and management.
Sharon said: "We have worked hard over the past three years to ensure the education we are giving our students is at least good.
"Two years ago the school was given a satisfactory judgement, this was disappointing and we knew we could do better for the children in this area.
"Last September I wrote to Ofsted inviting them in to re-grade the school as we knew we had made the improvements needed to be at lest good.
"It was a cause of celebration to be re-graded and the staff and students are already working on our plan to be outstanding.
"We are proud of what we have achieved at Darton College but we know there is still work to be done to reach the next stage."
