Fetal alcohol spectrum disorder (FASD) is a serious and widespread problem in this country. Positioned within the community with links to children, families, and healthcare systems, school nurses are a critical element in the prevention and treatment of those affected by fetal alcohol spectrum disorder. Although most school nurses are familiar with fetal alcohol syndrome (FAS) and the problems it poses, they may not be familiar with the newer term, fetal alcohol spectrum disorder. This article summarizes the most recent information about FASD and recently published guidelines on diagnostic criteria for FAS. Also outlined are primary, secondary, and tertiary prevention activities school nurses can take to help assure that children, families, and communities work to prevent the problem and to treat the children affected by it. (Contains 1 table and 4 figures.)