The Colorado Association of School Nurses (CASN) and the National Association of School Nurses (NASN) are the only state and national organizations that serve Colorado school nurses and school nursing exclusively. Membership in your state and national professional organization is important to help promote and improve the practice of school nursing in Colorado. Membership in your professional organization gives you an opportunity to meet and network with other school nurses in Colorado. It also gives you a voice in issues that impact school nurses and the students we serve.Learn more about membership.