Although gang culture affects a minority of schools, it is feared children as young as nine are being recruited to such groups.
The findings are drawn from a study commissioned by the NASUWT teachers' union.
The government says it is committed to supporting schools to tackle gang-related activities.
Following a spate of teenage murders, the extent of youth gang culture in the UK is a growing concern.
It is also a growing problem, with experts estimating that the number of gang members under the age of 16 has doubled in the last five years, the report says.
The NASUWT commissioned Perpetuity - a research consultancy company - to investigate the potential impact of gangs and gang culture on schools in the UK and it has published its interim report.
