Purpose: The purpose of this paper is to investigate the development and implementation process of the balanced scorecard (BSC) approach in an educational institution in the context of the Turkish educational system. It also aims, on the basis of the results of the applications in a particular school, to define principles through which the development of BSC could be successfully achieved. Design/Methodology/Approach: The study adopts a design-based research method which provides a particularly useful approach to the solution of real problems in the field of education. The study was carried out in a private educational institution with 161 members of staff including managers, teachers and personnel of the support units. Scorecards for the institution as well as 161 members of staff were developed. Findings: The examination of the developmental process suggests 12 design principles: willingness to change; managerial support; flexible management structure; appropriate team members; training of staff; availability of strategic planning; distinctive BSC dimensions; smart strategic objectives; balance between leading and lagging indicators; developing individual scorecards; open communication system; structured report format. Originality/Value: This is the first study that develops BSC for a school in a Turkish context. The design principles, the author believes, are particularly useful for schools that do not have a strategic performance management background. This study is also important in terms of putting forward the applicability of BSC in educational organizations in different cultures and thus gaining new insights about the developmental process of BSC.