The Kauffman School is a public, tuition-free charter school serving Kansas City students. In the 2019-20 school year, the school enrolled 1,186 students in grades 5 through 12. Most (88 percent) of the students were low income, and 89 percent were Black or Hispanic. To measure the impact of the Kauffman School on its students, the authors identified a group of students in other Kansas City district and charter schools who had similar demographic characteristics and achievement at the end of 4th grade. They compared outcomes for those students to the outcomes of Kauffman students in 5th grade through high school graduation and enrollment in college. During March 2020, the Kauffman School switched to virtual instruction due to the COVID-19 pandemic, as did all schools in Missouri. Because attendance and suspension data were not tracked during the fourth quarter of 2019-20, the results in this report are based on the first three quarters of that year. This report discusses the impact of the Kauffman School on college enrollment, high school graduation, attendance, and suspensions. Key findings include: (1) Substantial positive impacts on enrollment in four-year colleges; (2) Impact on enrollment in four-year colleges compares favorably to those found in studies of other high-performing charter schools; (3) Eighty percent of Kauffman School graduates enrolled in a four-year college; (4) Positive impact on attendance; and (5) Reduced suspensions.