The Flag System is a method that helps to promote healthy sexual behavior and prevent and limit sexually unacceptable behavior. The method uses six objective and neutral criteria, and four flags to range the behavior from okay to very seriously unacceptable behavior. The method is designed to help providers and caregivers to correctly assess sexually (un)acceptable behavior, promote discussion about the topic, and present an appropriate response. Each flag links to an educational response. 

Drawings and case history help professional educators to assess and discuss (un)acceptable sexual behavior amongst and against children and young people. The method can be used with children, parents, and all professional educators working with children, and creates a common language and approach. Studies have shown that this method creates confidence for professionals, and they report feeling better equipped to assess behaviors and address them with clients and within their teams. A version for working with adult clients is available in 2021.