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The study compares matched schools that used Bridges in the 2024-25 year with comparison schools that did not. Analytic samples include 27 schools total, spanning elementary schools in California and Arizona, and use district-level and subgroup-focused analyses. 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Cook, PhD, Jennifer R. Morrison,  \nPhD, Steven M. Ross, PhD  \nSeptember 2025  \nAn Efficacy Study of the Bridges Curriculum on Student Learning  \nMichael A. Cook, PhD, Jennifer R. Morrison, PhD, Steven M. Ross, PhD  \nCenter for Research and Reform in Education The Johns Hopkins University School of Education 2800 N. Charles St  \nBaltimore, MD 21218  \n[https://education.jhu.edu/crre](https://education.jhu.edu/crre)  \nPreferred citation: Cook, M.A. , Morrison, J. M. , & Ross, S. M.(2025) . An efficacy study of the Bridges curriculum on student learning. Center for Research and Reform in Education, The Johns Hopkins University.  \nNotice of Trademark: “The Johns Hopkins University” and “JHU” are registered trademarks.  \nCopyright © 2025 Johns Hopkins University. No part of this report may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, website display, or other electronic or mechanical methods, without the prior written permission of the Johns Hopkins University Center for Research and Reform in Education. For permission requests, please contact CRRE.  \nMLC Efficacy Study  \nCenter for Research and Reform in Education  \nContents  \nEXECUTIVE SUMMARY........................................................................................................................ 2  \nINTRODUCTION .................................................................................................................................... 3  \nOverview of the Bridges in Mathematics Third Edition Curriculum ...................................... 3  \nOverview of the Study ................................................................................................................. 3  \nMETHOD ................................................................................................................................................ 4  \nResearch Design ......................................................................................................................... 4  \nParticipants .................................................................................................................................. 4  \nArizona District ......................................................................................................................... 5  \nCalifornia District ...................................................................................................................... 6  \nMeasures ...................................................................................................................................... 7  \nAnalytical Approach .................................................................................................................... 9  \nRESULTS ............................................................................................................................................. 11  \nMathematics Achievement Impacts......................................................................................... 11  \nOverall Impacts ...................................................................................................................... 11  \nOverall Impacts by District ..................................................................................................... 12  \nSubgroup Analyses ................................................................................................................ 14  \nSubscore Impacts................................................................................................................... 17  \nDISCUSSION ....................................................................................................................................... 20  \nMain Impact Analyses ............................................................................................................... 20  \nSubgroup Analy","cbCaiscYShr9sah5","https://ap.wps.com/l/cbCaiscYShr9sah5","pdf",765830,36,"English","# Contents\n## Executive Summary\n## Introduction\n## Method\n## Results\n## Discussion\n## References\n## Appendix A: Baseline Equivalence and Attrition\n## Appendix B: Descriptive and Exploratory Analyses\n## Appendix C: Full Subgroup Regression Tables-California\n## Appendix D: Full Subgroup Regression Tables-Arizona","[{\"question\":\"What curriculum and grade range does the study evaluate?\",\"answer\":\"The study evaluates the Bridges Third Edition mathematics curriculum for Grades K-5 student learning.\"},{\"question\":\"How does the study compare student achievement outcomes?\",\"answer\":\"It uses a prospective school-level quasi-experimental design comparing matched schools that used Bridges in 2024-25 with comparison schools that did not.\"},{\"question\":\"Where and how are results analyzed?\",\"answer\":\"Results include overall achievement impacts, overall impacts by district, subgroup analyses, and subscore impacts, with additional reporting through full subgroup regression tables for California and Arizona.\"}]","An Efficacy Study of the Bridges Curriculum on Student Learning - September 2025 | PDF",1792046370,91]