The Building Assets, Reducing Risks (BARR) model is a comprehensive, strength-based approach to education that aims to improve achievement for all students by improving a school's effectiveness at building relationships, leveraging real-time student data, and capitalizing on the strengths of each student. The U.S. Department of Education's Investing in Innovation (i3) program provided the BARR program developers with a validation grant that provided funding to bring the BARR model to more high schools around the country. In addition, the validation grant required and funded an independent evaluation of the impact of the BARR model on student outcomes. The impact evaluation of the BARR model is a randomized controlled trial (RCT), which is the most rigorous research design for estimating the impact of a program. Individual ninth-grade students in the 11 high schools in the evaluation were randomly assigned to implement the BARR model and receive supports from the providers or to not implement the BARR model. American Institutes for Research (AIR) is conducting this evaluation in 11 high schools, divided into three annual cohorts. This report presents preliminary findings for the first two of these cohorts. It presents impact findings from the first and second cohorts of schools to implement the study and the BARR model, in the 2014-2015 and 2015-2016 academic years.