Much has been written about school-university partnerships including their general intent to positively impact student learning through the continuous professional development of classroom teachers. This article, which offers an in-depth description of the growth of a school-college partnership, follows the development of a partnership between a school and a college of education from what could be described generally as a partnership to a true PDS model. Here we analyze an effort undertaken to build and strengthen the partnership between the school and the college within the framework of the ''Nine Essentials'' of the National Association for Professional Development Schools. We present the school-college partnership's joint philosophies, emerging structure, and resulting outcome. The outcome of the six-month collaborative project was the emergence of a partnership model aligned with the ''Nine Essential'' components and an established and mutually beneficial research agenda.