Recognizing the need for a school nurse workload model based on more than the number of students in a caseload, the National Association of School Nurses issued recommendations related to measuring school nurse workload. Next, a workforce acuity task force (WATF) was charged with identifying the steps needed to further the recommendations. As a first step, the WATF focused on identifying existing literature and practices related to school nurse workload. The purpose of this article is to synthesize and categorize the factors that were identified, delineate sources for collecting and retrieving these factors, and make recommendations for clinicians and researchers interested in developing instruments to measure school nurse workload.