DARTON College's turnaround is almost complete after it received a positive report from Ofsted.
Principal Sharon Rossides 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.
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.
The report states the principal, senior and middle leaders share high expectations and total commitment to ensure every student achieves their potential, whatever their circumstances.
The report says the school has a 'stimulating and vibrant' atmosphere, enhanced by an increasingly relevant and challenging curriculum which supports students' spiritual, moral, social and cultural development.
Sharon said: "We have worked hard over the past three years to ensure the education we're 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 least 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're proud of what we have achieved at Darton College but we know there's still work to be done to reach the next stage."
