Ninth grade often is considered a make-or-break year in determining whether students will be successful in high school and beyond. The Texas Education Agency (TEA) created the Texas Ninth Grade Transition and Intervention Program to ease the transition of at-risk students into high school and increase the likelihood that they graduate on time and are prepared for college and careers. Prior to rolling out the program statewide, TEA wanted to understand the effect of the program on student achievement. The comprehensive evaluation conducted by American Institutes for Research (AIR) and its partner Gibson Consulting Group found that the program significantly increased the English and mathematics assessment scores of participating students compared to similar students who did not participate in the program. The results of both the summative evaluation and a formative evaluation regarding program implementation provided the Texas Legislature with nuanced contextual information to understand the impact of the program.