The purpose of this case study was to discover the critical attributes of a student achievement program, known as "Think Gold," implemented at one urban comprehensive high school as part of the improvement process. Student achievement on state assessments improved during the period under study. The study draws upon perspectives on motivation as a lens for understanding the attributes of the program. The theoretical framework guiding this study emerged from a convergence of literature on high school improvement and studies on the use of extrinsic motivation to promote student achievement. These studies revealed a gap between the goals promoted for improved student outcomes and the performance results from non-consequential, large-scale assessments. Data sources included structured interviews with school personnel and students, achievement data from 2009-2011, and survey results, which were analyzed to construct a case narrative. Critical attributes of the achievement program were distilled, including the differentiated incentive system, sustainability, and personalized meaning for students between state assessments and their decision-making. This study is not an evaluation of the program, but the discussion offered of the use of extrinsic motivation to promote student achievement may prove beneficial. (Contains 4 tables.)