The Katrina Inspired Disaster Screenings and Services (KIDSS) toolkit supplement is designed to assist recovering communities and schools in understanding the needs of and the targeting of services toward children and adolescents. The goal of this study is to understand the efficacy of the KIDSS self-report approach for wide-spread screening of children into services and for reducing trauma symptoms of youth exposed to large-scale disasters such as Hurricane Katrina and additional traumas or disasters that occur over the course of recovery. A longitudinal survey design was used to screen 4,593 children and adolescents on the National Child Traumatic Stress Network Hurricane Assessment and Referral Tool. In addition, the subsample that received trauma informed services (N = 208), completed the University of California at Los Angeles Posttraumatic Stress Disorder Reaction Index at three time points. The mean age of students was 10.9 (SD = 3.2); 51% were female, and 49% were male. Reported ethnicities were as follows: 57% Caucasian, 27% African American, and 16% other. Results revealed that a greater proportion of students were appropriately referred into treatment (compared with those not receiving services and those who received treatment had a greater decrease in trauma symptoms). In addition, for the subsample that received services (N = 208), posttraumatic stress disorder symptoms decreased significantly following treatment. Empirical data supports that the KIDSS approach was effective at connecting students in need of services and for children identified, those that participated in school-based trauma treatment demonstrated reduced trauma symptoms. This study provides practical application through the steps outlined in the KIDSS process following disaster exposure. (PsycINFO Database Record (c) 2019 APA, all rights reserved)