Teacher education programs are always evolving. To provide opportunities for pre-service teachers to combine pedagogy with practical experience, many programs are developing school-university partnerships. The pairing of pre-service teachers with experienced mentor teachers offers enriched field experience opportunities. The effect of the partnership on mentor teachers, university faculty, and pre-service teachers has been researched, but the role of the principal in the partnership has not been closely examined. Supportive principals provide leadership in many areas within the context of the partnership. Partnerships formed in professional development schools may mature over time, but initially, the tone of the partnership is dependent on the leadership and support of the school administrator. The principal influences placements of candidates, mentor teachers' participation, partnership activities, and the depth of the partnership bond. The contributions of a school administrator principal are incalculable.