This article addresses measurement issues in the examination of resiliency within school settings. The Resiliency Scales for Children and Adolescents is described as an example of an instrument developed specifically for this purpose. This description identifies developmentally sound factors of personal resiliency that are relevant for youth in school settings. Also addressed are criteria of psychometric soundness required for universal screening and impact tracking, norm-based profiles of personal resiliency, and summary indices of resource and vulnerability for use in screening. C 2011 Wiley Periodicals, Inc.There are a number of methodological issues related to resilience/resiliency research and practice, which include defining, measuring, and interpreting resilience. This article describes the potential of the Resiliency Scales for Children and Adolescents (RSCA; Prince-Embury, 2006b, 2007 as a measure of resiliency in students that is applicable for school practice within the classroom environment. Particular attention will be paid to the RSCA's utility as a screening measure to identify students with strengths or limitations in personal resiliency, as a planning measure on which to focus the design of resiliency interventions, and as an evaluation measure of the impact of resiliency interventions. Consistent with the zeitgeist of response to intervention (RTI), the RSCA has been designed to be an assessment method that is useful in school settings because it: (a) is based on developmentally appropriate factors of personal resiliency that are well grounded in theory, (b) is brief, user friendly, and easy to administer and thus applicable for classroom-wide and individual use, (c) is easy to interpret as well as theoretically and practically linked to intervention, and (d) has the sound psychometric properties required for use to monitor progress or evaluate the effectiveness of interventions.