This qualitative study describes the experiences of SI leaders in science courses. Analysis of data using Colaizzi's phenomenological approach has indicated the following advantages of the SI experience for SI leaders: (a) greater appreciation of the diversity of student learning styles, (b) increased understanding of the subject matter, (c) greater self-confidence as a learner, (d) development of closer relationships with faculty, (e) application of the strategies and skills learned as an SI leader in other courses, and (f) realization of the importance and value of collaborative learning. The results of this study can be used by Learning Center professionals and faculty to successfully recruit new SI leaders and to customize the SI model to maximize its effectiveness. (Contains 1 table.)