i-Ready Classroom Mathematics and Ohio State Assessment Performance
Overview
- Subject: Mathematics
- ESSA Level: 2 - Moderate
- State: Ohio
- Grades: 3–5
- Topic: Academic Achievement, Core Math
- Study Year: 2022–2023
- Program: i-Ready Classroom Mathematics
- Test Alignment: Ohio’s State Tests (OST)
Published March 2025
To understand the relationship between the use of i-Ready Classroom Mathematics (iRCL) core curriculum and performance on Ohio’s State Tests (OST) in mathematics, Curriculum Associates evaluated 2022–2023 OST Mathematics scores and proficiency levels for students with access to iRCL compared to students without access to iRCL. The study is based on more than 13,000 Ohio students in Grades 3–5.
The research findings demonstrate positive differences between OST scores and rates of proficiency for students attending schools with iRCL compared to similar students attending schools that do not leverage iRCL.
Meet the Authors

Jeffrey Yo
Associate Research Scientist
Curriculum Associates

Gregory King
Associate Director of Efficacy and Implementation Research
Curriculum Associates
