This paper discusses the role of evaluation in the development of Professional Development Schools (PDS) and how evaluation techniques can be used to increase the rigor of self-study activities in a PDS. Evaluation activities may be challenging for a PDS given limited resources. Yet, creative use of school and university expertise can help PDSs gain valuable information about their development and areas for improvement. We describe a collaborative evaluation project in which university and school site members worked together to develop evaluation questions and methods to enhance National Council for Accreditation of Teacher Education (NCATE) self-study procedures for Professional Development Schools. The processes surrounding the development of the PDS partnership, the development of the evaluation project, and the steps undertaken to conduct the evaluation are described. The description of the project highlights partnership activities in areas other than teacher education, which are not as common in the PDS literature. The article concludes with general findings from the evaluation and recommendations for PDSs wishing to conduct similar evaluation projects.