Research & Efficacy

Proven to Help Students Succeed

i-Ready Diagnostic Is Highly Rated in Grades K–8 by the National Center on Intensive Intervention

i-Ready Diagnostic received positive reviews on the key criteria of Reliability, Validity, and Classification Accuracy in Grades K–8 Mathematics and Reading for NCII's Academic Screener Tool Chart.

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Overview   |   Stretch Growth  |  Foundational Research   |   Impact and Efficacy   |   Linking Studies    |   Unfinished Learning


Research and Efficacy

Our assessment and instruction programs are backed by the industry’s most practical and applicable research. Every program we provide starts with an extensive research base and is followed by a continuous cycle of research, review, and improvement. The end result is a suite of programs proven to help your students succeed.

Stretch Growth: Research-Backed Recovery Metric

Developed years before the pandemic to provide an aspirational or “stretch” growth goal for students at any level, Stretch Growth is a novel approach to measuring student progress to proficiency and beyond. We have built a growing body of evidence that shares context on Stretch Growth goal setting on students and their learning over time.

Read our technical reports on Stretch Growth below:

Variation in i-Ready Growth: Is Typical Growth Enough for Students Who Have Fallen Behind?

Research support for the impact of achieving Stretch Growth on below-grade level learners

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i-Ready Stretch Growth in the Pandemic Context

This research report provides new validity evidence for i-Ready's Stretch Growth targets using a sample of students who tested after the onset of the COVID-19 pandemic.

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Variation in Attainment of i-Ready Stretch Growth in Reading and Mathematics: What Can We Learn from Students’ Usage of i-Ready Personalized Instruction?

This research examines instructional practices and Stretch Growth attainment.

READ THE RESEARCH

How i-Ready Instruction Usage Relates to Progress toward Stretch Growth®

This research supports the use of i-Ready Personalized Instruction as a strategy to support achievement of student Stretch Growth goals.  

READ THE RESEARCH

Foundational Research

Our assessment and instructional solutions are grounded in research to deliver rigorous instruction and comprehensive support to help students at all levels, from all backgrounds, achieve their greatest possible gains.

The Research Base: Phonics for Reading

This research base provides an overview of the foundational research and pedagogical approach in Phonics for Reading.

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The Research Base: Magnetic Reading Foundations Grades K–2

This research base provides an overview of Magnetic Reading Foundations for Grades K–2’s foundational research and pedagogical approach.

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The Research Base: Magnetic Reading Grades 3–5

The research base linked below provides an overview of Magnetic Reading’s foundational research and pedagogical approach.

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The Experts behind i-Ready and Ready

Meet the program authors, technical advisors, and efficacy advisors who help build and improve our products.

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Executive summaries about i-Ready.

The Research Base: i-Ready Personalized Instruction

The studies linked below provide an overview of our foundational research base and pedagogical approach.

MATHEMATICS | READING

High Ratings from NCII

i-Ready Diagnostic received high ratings from the National Center on Intensive Intervention (NCII).

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Putting the Science of Reading to Work

Learn how our programs were built to align with the core principles of the Science of Reading.

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The Research Base: i-Ready Classroom Mathematics

This research base provides an overview of i-Ready Classroom Mathematics' fundamental design principals and foundational research.

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Impact and Efficacy

iReady and Ready are backed by timely research conducted in diverse educational settings. This research meets the criteria for “evidence-based” as defined by the Every Student Succeeds Act (ESSA), qualifying these programs for Elementary and Secondary School Emergency Relief (ESSER) and School Improvement funding.

i‑Ready Efficacy: Research on i-Ready’s Impact

Research support for iReady and ESSA evidence

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Research on Program Impact of Ready Mathematics Blended Core Curriculum

Research support for Ready Mathematics and ESSA evidence

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Ready Efficacy: Research on Ready’s Impact

Research support for Ready supplemental programs and ESSA evidence

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Research on the impact of Magnetic Reading on Grades 3–5 in Iowa.

Impact of Magnetic Reading on Reading Achievement

Evidence supporting our Magnetic Reading Foundations (K–2) and Magnetic Reading (3–5) programs (both reviewed by Evidence for ESSA)

READ THE K–2 RESEARCH

READ THE 3–5 RESEARCH

Linking Studies

The iReady Diagnostic is highly correlated with leading national and state summative tests.

Alabama

i-Ready Diagnostic: Correlation Study with Alabama’s Comprehensive Assessment Program (ACAP)

Alaska

i-Ready Diagnostic: Linking Study with Alaska System of Academic Readiness (AK STAR)

Arizona

i-Ready Diagnostic: Linking Study with Arizona’s Academic Standards Assessment (AASA)

California

i-Ready Diagnostic: Linking Study with the California Assessment of Student Performance and Progress (CAASPP)

Colorado

i-Ready Diagnostic: Linking Study with Colorado Measures of Academic Success (CMAS)

Connecticut

i-Ready Diagnostic: Linking Study with Smarter Balanced Assessment (SBA) in Connecticut

Florida

i-Ready Diagnostic: Correlation Study with Florida Assessment of Student Thinking Progress Monitoring 1 and 2 (FAST PM1 and PM2)

Georgia

i‑Ready Diagnostic: Correlation Study with Georgia Milestones Assessment System (GMAS)

Illinois

i-Ready Diagnostic: Linking Study with Illinois Assessment of Readiness (IAR)

Indiana

i‑Ready Diagnostic: Linking Study with Indiana Learning Evaluation Assessment Readiness Network (ILEARN)

Iowa

i-Ready Diagnostic: Linking Study with Iowa Statewide Assessment of Student Progress (ISASP)

Kansas

i-Ready Diagnostic: Linking Study with Kansas Assessment Program (KAP)

Kentucky

i‑Ready Diagnostic: Linking Study with Kentucky Summative Assessment (KSA)

Louisiana

i-Ready Diagnostic: Linking Study with the Louisiana Educational Assessment Program (LEAP 2025)

Maryland

i-Ready Diagnostic: Linking Study with Maryland Comprehensive Assessment Program (MCAP)

Massachusetts

i-Ready Diagnostic: Linking Study with the Massachusetts Comprehensive Assessment System (MCAS)

Michigan

i-Ready Diagnostic: Linking Study with Michigan Student Test of Educational Progress (M-STEP) and the Preliminary SAT (PSAT 8/9)

Mississippi

i‑Ready Diagnostic: Linking Study with Mississippi Academic Assessment Program (MAAP)

Missouri

i-Ready Diagnostic: Linking Study with Missouri Assessment Program (MAP)

New Jersey

i-Ready Diagnostic: Linking Study with New Jersey Student Learning Assessments (NJSLA)

New York

i‑Ready Diagnostic: Linking Study with New York State Testing Program (NYSTP)

North Carolina

i-Ready Diagnostic: Correlation Study with the North Carolina End-of-Grade Tests (NC EOG)

Ohio

i‑Ready Diagnostic: Linking Study with Ohio’s State Tests (OST)

PARCC

i-Ready Diagnostic: Linking Study with the Partnership for Assessment of Readiness for College and Careers (PARCC) Test

Pennsylvania

i-Ready Diagnostic: Linking Study with Pennsylvania System of School Assessment (PSSA)

Rhode Island

i-Ready Diagnostic: Correlation Study with Rhode Island Comprehensive Assessment System (RICAS)

SBA

i-Ready Diagnostic: Linking Study with the Smarter Balanced Assessment (SBA)

South Carolina

i-Ready Diagnostic: Linking Study with South Carolina College- and Career-Ready Assessments (SC READY)

Texas

i-Ready Diagnostic: Correlation Study with State of Texas Assessments of Academic Readiness (STAAR)

Virginia

i-Ready Diagnostic: Linking Study with the Virginia Standards of Learning (SOL)

Wisconsin

i-Ready Diagnostic: Linking Study with the Wisconsin Forward Exam

West Virginia

i-Ready Diagnostic: Linking Study with the West Virginia General Summative Assessment (WVGSA)

Research on Unfinished Learning 

Learn about its impact and where to focus your efforts.