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The report is produced by independent evaluators and published by the Education Endowment Foundation, which supports evidence use to improve teaching and learning for children and young people. It includes methodology, impact results, cost rating, security classification of findings, effect size estimation, residual plots, missing data modelling, and subgroup interaction analyses, alongside executive summary and conclusions. The April 2026 update corrects compliance numbers and refines effect size interpretation.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/concept-cat-evaluation-report-updated-july-2025-updated-april-2026/584298/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/concept-cat-evaluation-report-updated-july-2025-updated-april-2026/584298.png","ImageObject",300,407,{"name":92,"@type":93},"Kyle","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-31","2026-10-15",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What study design does the Concept Cat evaluation report use?","Question",{"text":112,"@type":113},"The report describes a two-armed cluster randomised controlled trial and evaluates impacts using impact evaluation results and IPE results.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What changed in the April 2026 update compared with the July 2025 version?",{"text":117,"@type":113},"The update corrects mistakes in the recorded number of compliant children and fixes a compliance code issue that changes the CACE-derived effect size from 0.27 to 0.26.",{"name":119,"@type":110,"acceptedAnswer":120},"What types of appendices are included in the report?",{"text":121,"@type":113},"Appendix materials include EEF cost rating, security classification of trial findings, effect size estimation, residual plots, missing data logistic regression output, and subgroup interaction model results.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},584298,1792210912,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145,"preview_page_count":4},3985741905716,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","Concept Cat: A two-armed cluster randomised controlled trial  \nEvaluation report  \nJuly 2025  \nUpdated April 2026  \nMiguel Subosa, Fin Oades, Erin Dysart, Louise Tracey, Anna Brian, and Elena Rosa Speciani  \nBright Futures North West Early Years Stronger Practice Hub  \nHEART – Midlands Early Years Stronger Practice Hub  \nLiverpool City Region and Beyond Early Years Stronger Practice Hub  \nThe Education Endowment Foundation is an independent charity dedicated to breaking the link between family income and education achievement. We support schools, colleges and early years settings to improve teaching and learning for 2 – 19-year-olds through better use of evidence.  \nWe do this by:  \n• Summarising evidence. Reviewing the best available evidence on teaching and learning and presenting in an accessible way.  \n• Finding new evidence. Funding independent evaluations of programmes and approaches that aim to raise the attainment of children and young people from socio-economically disadvantaged backgrounds. Putting evidence to use.  \n• Putting evidence to use. Supporting education practitioners, as well as policymakers and other  \norganisations, to use evidence in ways that improve teaching and learning.  \nWe were set-up in 2011 by the Sutton Trust partnership with Impetus with a founding £125m grant from the Department for Education. In 2022, we were reendowed with an additional £137m from government, allowing us to continue our work until at least 2032.  \nFor more information about the EEF or this report please contact:  \nEducation Endowment Foundation  \n5th Floor, Millbank Tower 21–24 Millbank  \nSW1P 4QP  \n0207 802 1653  \n[info@eefoundation.org.uk](info@eefoundation.org.uk)  \n[www.educationendowmentfoundation.org.uk](www.educationendowmentfoundation.org.uk)  \nContents  \nAbout the evaluator .............................................................................................................................................. 3  \nAcknowledgements ............................................................................................................................................. 3  \nExecutive summary.............................................................................................................................................. 4  \nIntroduction......................................................................................................................................................... 6  \nMethods ............................................................................................................................................................ 15  \nImpact evaluation results ................................................................................................................................... 41  \nIPE results ......................................................................................................................................................... 57  \nConclusion ........................................................................................................................................................ 99  \nReferences ...................................................................................................................................................... 102  \nAppendix A: EEF cost rating .............................................................................................................................. 105  \nAppendix B: Security classification of trial findings............................................................................................ 106  \nAppendix C: Effect size estimation .................................................................................................................... 108  \nAppendix D: Residual plots from analysis models.............................................................................................. 113  \nAppendix E: Missing data logistic regression output............................","cbCaigTCSuU8nVov","https://ap.wps.com/l/cbCaigTCSuU8nVov","pdf",3835720,128,"English","# About the evaluator\n# Acknowledgements\n# Executive summary\n# Introduction\n# Methods\n# Impact evaluation results\n# IPE results\n# Conclusion\n# References\n# Appendix A: EEF cost rating\n# Appendix B: Security classification of trial findings\n# Appendix C: Effect size estimation\n# Appendix D: Residual plots from analysis models\n# Appendix E: Missing data logistic regression output\n# Appendix F: Subgroup interaction model results","[{\"question\":\"What study design does the Concept Cat evaluation report use?\",\"answer\":\"The report describes a two-armed cluster randomised controlled trial and evaluates impacts using impact evaluation results and IPE results.\"},{\"question\":\"What changed in the April 2026 update compared with the July 2025 version?\",\"answer\":\"The update corrects mistakes in the recorded number of compliant children and fixes a compliance code issue that changes the CACE-derived effect size from 0.27 to 0.26.\"},{\"question\":\"What types of appendices are included in the report?\",\"answer\":\"Appendix materials include EEF cost rating, security classification of trial findings, effect size estimation, residual plots, missing data logistic regression output, and subgroup interaction model results.\"}]","Concept Cat - Evaluation report - Updated July 2025, Updated April 2026 | PDF",1792050439,323]