The problem was that it was also not known how extracurricular activities, such as athletics-based, art-based, and academic-based activities correspond to specific educational benefits for high school students with mild and moderate disabilities attending a single public school in the United States. To address the problem, the researcher used a qualitative methodology in the study, focusing on collecting rich and in-depth information from teachers, parents, and school administrators. The target sample size was 10 participants for each group, resulting in a total sample size of 30 parents, teachers, and school administrators (10 teachers, 10 parents, and 10 school administrators). Data collected included individual semi-structured interviews, researcher's journal, and documents. The researcher used thematic analysis for coding and categorizing data into themes in order to make sense of the meaning of the data and to highlight key information. The results of the analysis revealed that parents, teachers, and school administrators of students with mild or moderate disabilities perceived extracurricular activities presented equal opportunities in school and in real life. Athletic-based activities were perceived to be most beneficial to academic achievement, interpersonal relations, and physical and mental health. Art-based activities were perceived to benefit expressing oneself and boosting creativity. Academic-based activities were perceived to benefit achieving goals in school and future career goals, social skills, and developing positive perceptions on school and learning. [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.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]