Social and emotional skills, such as Sustaining Effort and Maintaining Composure, are related to many positive outcomes, including academic performance and life satisfaction, and are often taught through social and emotional learning (SEL) programs. The purpose of this study was to examine the relationship between these skills and ACT® test scores. Mosaic™ by ACT® Social Emotional Learning assessment data was collected from 6,747 students (53% female, 47% male; 67% White, 12% Hispanic, 6% Black, 3% Asian; 74% 11th graders, 23% 12th graders at the time of the ACT test) and matched to their ACT scores. Their Mosaic by ACT SEL assessment data were captured during the school years 2018-2019 and 2019-2020, while the ACT tests occurred from 2018 to 2021. The assessment measures five social and emotional skills: (1) Sustaining Effort; (2) Getting Along with Others; (3) Maintaining Composure; (4) Keeping an Open Mind; and (5) Social Connection. The data show that there is a clear positive relationship between social and emotional skills and ACT Composite scores.