The authors examined the relationships of ACT Aspire test scores and high school course grades, AP test scores, and Partnership for Assessment of Readiness for College and Careers (PARCC) test scores, demonstrating criterion-related as well as convergent and discriminant validity evidence. They found that ACT Aspire test scores are strong predictors of success in standard, career-focused, AP, and dual enrollment courses. Moreover, ACT Aspire scores demonstrate expected convergent and divergent relations across grade levels and with other standardized measures of college and career readiness. The data was provided by the Arkansas Department of Education.