Teacher Effectiveness Research (TER) could be a foundation upon which a valid teacher evaluation system could be built. However, even a technically exceptional evaluation system may be doomed to fail if the political dynamics that influence its implementation are not examined. This study examines the extent to which a proposed teacher evaluation system based on TER is possible to gain acceptance from the main stakeholders of the Cypriot educational system. The extent to which stakeholders' reactions to the proposed system are associated with their personal interests and concerns is also investigated. Both groups recognized that TER could be a foundation upon which a valid teacher evaluation system could be built but were critical of suggestions that might reduce their professional power. In order to reach consensus, policy makers should establish procedures to ensure a clear understanding among stakeholders of both the theoretical assumptions of the proposed system and the type of concerns that stakeholders might have against change.