This study employed a quasi-experimental design to examine the effects of a school-based youth participatory action research program on the education outcomes of participating high school students. The program was a year-long elective course in six high schools in the same California district whose student population is predominantly low-income youth of color. A propensity score matching approach compared the reading achievement, attendance rates, and discipline referral rates of 153 students who participated in the program to nonparticipating peers with similar demographics and baseline scores on the outcomes. Results showed that the program significantly improved students' attendance rates with less compelling evidence for its effect on reading achievement. These findings suggest that youth participatory action research may be an effective pedagogical practice for high school students, particularly low-income students of color.