On behalf of the Utah State Board of Education, the Evaluation and Training Institute conducted an evaluation on Utah’s Early Intervention Software Program (EISP) for Reading during the 2018–2019 school year. The EISP was implemented in 88 local education agencies that had the option of selecting one of four adaptive, computer-based literacy software programs—including i-Ready for Reading—for use with all students in Grades K and 1 and striving readers in Grades 2 and 3. The evaluators found that i-Ready had a positive and statistically significant impact on literacy achievement (as measured by the Acadience Reading composite scores) for students in Grades K, 1, and 3. Of the four vendors, i-Ready had some of the largest effect sizes (i.e., effect size = .33 for Grade K, effect size = .32 for Grade 1, and effect size = .25 for Grade 3). This study meets Every Student Succeeds Act Level 2 criteria.