As part of its ongoing efforts to raise the academic achievement of children from low-income families in Kansas City, Missouri, the Ewing Marion Kauffman Foundation founded the Ewing Marion Kauffman School in fall 2011. The Kauffman School's mission is "to prepare students to excel academically, graduate from college, and apply their unique talents in the world to create economically independent and personally fulfilling lives" (Ewing Marion Kauffman School 2013). As a public charter school, the Kauffman School is tuition-free and serves students living in Kansas City. In the 2014-15 school year, the Kauffman School enrolled 561 students in grades 5-8; approximately 85 percent of them were low-income and 89 percent were black or Hispanic. The Kauffman School has ambitious goals for its students, including accelerated learning, high attendance levels, and exemplary behavior. In this report, the authors summarize information about the impact of the Kauffman School on student achievement, attendance, and rate of suspensions. Their findings indicate that in the 2011-12 through 2014-15 school years, the Kauffman School had positive, statistically significant, and educationally meaningful impacts on student achievement growth in mathematics, ELA, and science beyond the growth achieved by students in other Kansas City public schools. Two appendices are included: (1) Data, Sample Selection, and Analysis Methodology; and (2) Sensitivity Analyses.