Thesis advisor: Henry Braun / Informed by Astin's Input-Environment-Outcome (I-E-O) model and Pascarella's general model, this study explored the nature of student-athletes' engagement in educationally purposeful activities, described their engagement patterns, and revealed the relationships between student engagement factors and college outcomes by class and gender for 2596 student-athletes from 30 Division-I institutions. This research demonstrated that the NSEE Five Benchmarks constructed for the general population did not fit student-athletes. Therefore, engagement factors for student-athletes were constructed based on a subset of component items from the Five Benchmarks. Hierarchical Linear Models (HLM) were then applied to National Survey for Student Engagement (NSSE) 2006 and the aggregated school level data from the NCAA. The research results reveal that the association patterns between engagement factors and college outcome variables Satisfaction (SA), General Education and Personal Competence (GEPC), and Personal and Social Development (PSD) across all class and gender subgroups are very similar, but differ from those for GPA. This research concludes that engagement in educationally purposeful activities is the best predictor for student-athletes' college outcomes (except GPA). The analyses also reveal that what students do on campus contributes more to their college outcomes than who they were at matriculation and which school they attend. In particular, for all outcomes, the fraction of the total variance due to between-school differences was very small and the relationships between the coefficients of school-level equations and school-level characteristics were inconsistent. The results of this study, along with other related studies, can help colleges devise strategies to better fulfill their primary obligation to create genuine educational opportunities for their student-athletes through fostering their holistic development. / Thesis (PhD) — Boston College, 2013. / Submitted to: Boston College. Lynch School of Education. / Discipline: Educational Research, Measurement and Evaluation.