Numerous research based social emotional learning curriculums are available to school districts. The purpose of this study was to examine the potential impact of Second Step, a researched social emotional learning curriculum, and the impact it had on kindergarten, first grade, and second grade students' discipline in school. This quasi-experimental, ex post facto study was conducted in an elementary south suburban Chicago school district serving approximately 825 students in grades kindergarten through second grade. The study consisted of two elements, aggregated and disaggregated discipline referral data pre and post Second Step implementation. The first element identified whether there was a difference in kindergarten through second grade elementary discipline referrals before and after teachers delivered weekly social emotional lessons using the Second Step curriculum.?The second element of the study was to disaggregate the discipline referrals into gender and grade level analyses. The discipline referrals were disaggregated into male and female discipline referrals and grade level specific discipline referrals to analyze pre and post Second Step implementation to determine if there was a difference in discipline referral data. The study yielded mixed results as the aggregated data showed no statistical significance pre and post Second Step implementation. The disaggregated data for males and females also indicated no statistical significance pre and post Second Step implementation. However, the disaggregated data for kindergarten and second grade each demonstrated a statistically significant decrease in the number of student discipline referrals for students receiving Second Step, while first grade demonstrated a statistically significant increase in the number of student discipline referrals pre and post Second Step implementation. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]