The challenge of designing and implementing teacher evaluation reform throughout the U.S. has been represented by different policies, teacher evaluation components, and difficulties with implementation. The purpose of this qualitative embedded single case study was to explore teacher perceptions about new evaluation model implementations and how new model implementations impact the relationships between teachers and administration. The main unit of analysis was teachers at one school experiencing the implementation of new evaluation reform. The sub-units were the experience levels of teachers, specifically New Teachers, Mid-career Teachers, and Seasoned Teachers. Findings in this research demonstrated a protectiveness of the low income school in which the participants work, and a lack of trust in the state understanding the needs of a low performing school. The findings indicated teachers perceive the lack of local control or input into the development or implementation of a new evaluation tool may create feelings of mistrust and ulterior motives. Results also emerged suggesting that teachers perceive a new teacher evaluation model may add stress to the site, provide tools for feedback and accountability, and possibly negatively impact the relationships with students. Finally, the findings indicated striking differences of the perceptions of teachers with different levels of teaching experience. Teachers of all experience levels perceived similar, positive relationships between teachers and administrators. However, the perceptions of the current evaluation tool was markedly different based on years of experience. New Teachers and Mid-Career Teachers stressed a desire to receive feedback and the need for feedback to improve their practice. Conversely, Seasoned Teachers stated a clear lack of need or desire for feedback. Additionally, All experience level groups perceived that there may be some level of added stress during the implementation of a new evaluation tool. Seasoned Teachers Mid-Career Teachers perceive the possibility of a new tool as a negative event, while New Teachers viewed this as an opportunity for accountability and alignment. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]