Police in Gleadless and Woodseats sent 25 letters home to the parents of youths found causing trouble or a nuisance last month.
The ‘parental advisory letters’ are hand delivered by police community support officers when young people have been caught committing anti-social behaviour.
If a child’s behaviour does not improve a member of the youth offending service visits with a second letter.
Insp Ian Stubbs, of Gleadless Valley Safer Neighbourhood Team, said the idea is to give children a chance to change their behaviour and to offer support to parents.
“The past two years has seen significant reduction in incidents of anti-social behaviour,” he said.
“We are currently experiencing a reduction of 15 per cent year to date on the past 12 months. We now average 14.5 incidents per day compared to 19.6 incidents per day two years ago.
“We will continue to work hard at improving the relationship between young people and the police as I believe this will have the greatest impact on anti-social behaviour.”