School vandalism outranks all other assaults on private and public property. Private property vandalism also results in millions of dollars in damages. For the lucky ones who have insurance, the actual cost to them will be less, but eventually they will pay higher costs for insurance. Vandalism in the private sector occurs for many of the same reasons as the public sector. Repair damage immediately.
Quick repair keeps perpetrators from admiring their handiwork and duplicating it someplace else.
Ask police for extra patrol. This will act as a deterrent to the vandal. Report all incidents. Be prepared to prosecute the perpetrators including asking for restitution. Insure that all areas are well lit.