The De Warenne Academy is a secondary school with academy status on Gardens Lane in Conisbrough, South Yorkshire, England.

The Academy is sponsored by Delta Academies trust who also support many other schools in Doncaster.

The school changed its name (from Northcliffe School) in September 2009, when it became an academy and moved into a new building in 2013. Previously it had been Northcliffe School, a secondary modern school.

The school was the centre of controversy in the early 2000s due to a proposal to convert it into an academy run by the Emmanuel Schools Foundation, a Christian charity. The proposal was withdrawn in 2004 after legal threats by the National Secular Society.

The school was part of the Doncaster Collegiate Sixth Form which combined the sixth form offering from Ash Hill Academy, De Warenne Academy, Don Valley Academy, Rossington All Saints Academy and Serlby Park Academy however this was discontinued after several years.

• EduBase

• Teacher attacked September 2005 by former pupils
• Injured teacher
• Pupil killed by air gun in May 2005
• Academy plan dropped in October 2004
• Parents put school on eBay in September 2004
• Protest over Academy plan in June 2004
• Placed in special measures in 2003