Notre Dame High School has been rated the best state secondary school in Sheffield by a website that monitors the performance of schools over the past year.
Many parents in the city are currently choosing secondary schools for the children to start in September 2016.
The website - www.schoolsguide.co.uk - has rated all the secondary schools in the area according to key performance data including exam results, Ofsted reports, ‘value added’ score and pupil to teacher ratio.
Parents are also able to write a review of their child’s school and compare against others locally with a maximum five star rating.
But Paul Tarn, regional chief executive for Outwood Grange Academies Trust - which runs Outwood Academy City - said the website doesn't give a totally up to date assessment of how Sheffield's schools currently rank.
Mr Tarn said: Outwood Academy City is ranked as the 4th highest performing school in Sheffield behind, Tapton, Notre Dame and Silverdale.
"The school was 22nd out of 25 schools in 2013, 12th out of 25 in 2014 and 4th out of 26 (UTC now open) in 2015.
"A total of 68% of students got 5 A*-C grades including English and maths and the Outwood Academy chain is the highest performing group in the country.
"Based on this pedigree it is surprising that we remain for this moment in time the only school in Sheffield with places. I am confident that this rapid improvement will continue in 2016."
The top two secondary schools in Sheffield according to the website are independent schools - Birkdale School, and Sheffield High School.
The top ten rated state secondary schools in Sheffield are:
1. Notre Dame High School
2. Silverdale School
3. Tapton School
4. King Edward VII School
5. Bradfield School
6. High Storrs School
7. All Saints' Catholic School
8. Meadowhead School
9. Parkwood E-Act Academy
10. Sheffield Park Academy