Scarborough police are urging residents to report any incidents of anti-social behaviour in and around the grounds of Scalby School.
In recent months there have been several incidents of littering and damage caused within the school grounds which has caused great inconvenience to the staff.
The most recent incident was last weekend (6-8 October 2012) when someone set fire to the goal nets on the school football pitch and littered the grounds with beer bottles and takeaway cartons.
The damage had to be repaired and the mess cleared up ready for the facilities to be used by pupils on Monday morning.
PC Alan Robson, of Scarborough Safer Neighbourhood Team, said: "Although this may seem like a relatively minor issue it is causing great annoyance to the staff at the school who have been forced to spend money and time - which would be better spent with pupils - tidying up and repairing damage.
"It is the 70th anniversary of the school on Saturday 13 October 2012 and it's a shame that the celebrations have been spoilt for some by the ongoing damage and anti-social behaviour.
"I am appealing to local people to help put a stop to this mindless behaviour by reporting seeing people drinking or acting anti-socially in the school grounds or the surrounding area to the police or Crimestoppers."
Anyone with information about anti-social behaviour in and around Scalby School is urged to contact North Yorkshire Police on 101 - select option 2 - and ask for Alan Robson or Scarborough police.
Alternatively, Crimestoppers can be contacted anonymously on 0800 555 111.
12.00pm - 10 October 2012