A report has raised concerns that some teachers were not aware how frequently name-calling is being used in schools.
The Ofsted report, based on visits to 56 schools and discussions with around 2,000 pupils and staff, looked at the best ways that schools can prevent and tackle bullying.
It said it was clear that pupils were using derogatory language outside of the classrooms, such as in the playground, although at times it spilled over into lessons.
More top news
A 17-year-old boy has been charged with the murder of two men in Ipswich.
The X Factor judge praised the One Direction star for his bravery - after performing on the show just days after his mother's death.
At least 13 people have been killed by a car bomb after two explosions went off close to a football stadium in Istanbul.