Although much is known about the benefits of student teaching in developing preservice teachers, less is known about preservice teachers' earlier field experiences at the freshman and sophomore academic levels. This study examined a student-led educational organization that provided an early, whole-school immersive field experience through the creation of the third space. The Whole-School Immersive Program (WISP) that created this third space brought together university faculty, preservice teachers, P-12 educators, and their administrators. Through a qualitative case study approach that utilized semi-structured focus group and individual interviews, alumni surveys, and participants' applications, this study examined the program's influences on preservice teachers. The findings indicated that these preservice teachers gained a deeper understanding of the school context, (dis)confirmed their desire to become educators, and gained knowledge of personal inquiry from participating in this student-led educational organization.