Educators and educational support staff are becoming increasingly aware of the importance of systematic efforts to support students' social and emotional growth. Logically, the success of social-emotional learning programs depends upon the ability of educators to assess student's ability to process and utilize social-emotional information and use data to guide programmatic revisions. Therefore, the purpose of the current examination was to provide evidence of the structural validity of the Social-Emotional Learning Scale (SELS), a freely available measure of social-emotional learning, within Grades 6 to 12. Students (N = 289, 48% female, 43.35% male, 61% Caucasian) completed the SELS and the Strengths and Difficulties Questionnaire. Confirmatory factor analyses of the SELS failed to support a multidimensional factor structure identified in prior investigations. The results of an exploratory factor analysis suggest a reduced 16-item version of the SELS captures a unidimensional social-emotional construct. Furthermore, our results provide evidence of the internal consistency and concurrent validity of the reduced-length version of the instrument. Our discussion highlights the implications of the findings to social and emotional learning educational efforts and promoting evidence-based practice.