i-Ready Classroom Mathematics is a comprehensive Grades K–8 mathematics program that is designed to help teachers foster a strong mathematics learning culture as well as enhance student mathematics engagement, confidence, and achievement. This study compares students in Grades 3–5 with access to the curriculum to similar students without it. It leverages a sample of students representing multiple states to evaluate the differences in achievement and growth scores on the i-Ready Diagnostic for Mathematics.

Findings show that students in schools that purchased i-Ready Classroom Mathematics outperformed students in schools that did not purchase the curriculum in Diagnostic for Mathematics scores and growth metrics. Positive results were maintained among students who identify as Hispanic, Black, those classified as economically disadvantaged, English Learners, and as having a disability. Findings support a student-centered approach to mathematics as represented by i-Ready Classroom Mathematics.