This article reports findings to promote the best practices of a transformative teaching and learning environment from a case study of a year long, full immersion Secondary Level Professional Development School. The results support the idea that interns have a significant stake, active professional community commitment and a heightened awareness during their training and prior to employment. As a result of the full immersion PDS experience, there is a significant transformational impact in their personal and professional grounding as future career educators. Best practices for the promotion of authentic teacher preparation are discussed.