"Middle College High Schools" are alternative high schools located on college campuses that aim to help at-risk students complete high school and encourage them to attend college. The schools offer a project-centered, interdisciplinary curriculum, with an emphasis on team teaching, individualized attention, and development of critical thinking skills. Students are also offered support services, including specialized counseling, peer support, and career experience opportunities. The What Works Clearinghouse (WWC) reviewed six studies of the effectiveness of "Middle College High School." Only one study of "Middle College High School" met the WWC evidence standards. This randomized controlled trial included 394 students in the Seattle Public Schools who were assigned to an intervention group that was offered admission to the alternative high school or a control group that was not. Control group students were free to participate in other regular and alternative high schools operated by the school district and in General Educational Development (GED) programs. Most control group students participated in one of these other education options. Findings presented in this report were drawn from a follow-up survey administered about two years after random assignment. "Middle College High School" was found to have no discernible effects on staying in school or completing school. (Contains 9 footnotes.) [This publication was produced by the What Works Clearinghouse. The following study is reviewed in this intervention report: Dynarski, M., Gleason, P., Rangarajan, A., & Wood, R. (1998). "Impacts of dropout prevention programs: Final report. A research report from the School Dropout Demonstration Assistance Program evaluation." Princeton, NJ: Mathematica Policy Research, Inc.]