The health and well-being of children who attend school is not collected in any national data sets. To effectively advocate for the health needs of children where they live, learn, and play, it is essential to build a National Uniform School Nurse Data Set. In 2014, school nurses nationwide were invited to join the Step Up and Be Counted! initiative. To prepare nurses for data collection and reporting, an informational website was established, a marketing campaign was launched, and a data collection tool was developed. Trainings were held at the national conferences of both the National Association of School Nurses and the National Association of State School Nurse Consultants, and locally by state school nurse consultants and champions. The goal of the 2014-2015 academic year was to establish the processes for such a large-scale effort. In Year 1, only three initial data sets were collected from participating school nurses from 37 states. The first year yielded much data, and challenges have been identified and addressed.