Curriculum Associates analyzed data from more than one million students who took the i-Ready Diagnostic in the 2017–2018 school year. In both reading and mathematics, students who used i-Ready for an average of 45 minutes or more per subject per week for at least 18 weeks experienced greater learning gains compared to students who did not, when controlling for prior achievement. This study also examined differences among student groups. Students with disabilities, ELs, and students with socioeconomic disadvantages who used i‑Ready all saw greater growth than students from the same demographic groups who did not have access to the program.
