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This WWC intervention report synthesizes evidence from four studies conducted in Head Start and state-funded preschool sites that meet WWC standards. Findings indicate positive effects on language outcomes, with a strong evidence tier based on sample size and site criteria. Effects on other outcomes remain unknown.",{"@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/world-of-words-intervention-report-preparing-young-children-for-school/587643/",{"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/world-of-words-intervention-report-preparing-young-children-for-school/587643.png","ImageObject",300,407,{"name":92,"@type":93},"Melati","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","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 is the goal of the World of Words curriculum?","Question",{"text":112,"@type":113},"World of Words aims to accelerate children’s vocabulary, concept, and science content knowledge through topic-centered conversations and shared book readings.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What evidence does the WWC use to evaluate World of Words?",{"text":117,"@type":113},"The WWC reviews research using its version 4.1 Review Protocol and evaluates study quality, statistical significance, and the number of contributing studies to determine effectiveness ratings and evidence tiers.",{"name":119,"@type":110,"acceptedAnswer":120},"What were the reported effects of World of Words on student outcomes?",{"text":121,"@type":113},"Four studies meeting WWC standards found positive effects on language outcomes, earning a strong evidence tier; effects on other outcomes were not known.","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},587643,1792498766,{"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":44,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144,"preview_page_count":4},962085570644,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","World of Words  \nIntervention Report | Preparing Young Children for School  \nA Publication of the National Center for Education Evaluation atIES  \nWHAT WORKS CLEARINGHOUSETM AUGUST 2023  \nWWC 2023-007  \nU.S. DEPARTMENT OF EDUCATION  \nChildren who know fewer words in preschool typically continue to have lower levels of vocabulary knowledge in higher grades than their peers who know more words. In fact, this difference continues to be pronounced and even widens as these children reach higher grade levels.1 Interventions that support vocabulary development and reading comprehension in early childhood have the potential to improve student language development, narrowing this gap.2 World of Words is a supplementary  \nGoal: World of Words aims to accelerate the development of children’s vocabulary knowledge, concept knowledge, and content knowledge in science through topic-centered conversations and shared book readings.  \ncurriculum used to help young children in prekindergarten develop vocabulary knowledge,3 concept knowledge, and content knowledge in science. The curriculum includes intentional conversations and shared book readings of texts focused on science topics.  \nThe What Works Clearinghouse (WWC) reviews existing research on educational interventions to identify evidence-based programs and practices. This WWC intervention report summarizes the available evidence on the effects of World of Words on student outcomes.  \nDid World of Words improve student outcomes?  \nFour studies of the World of Words program conducted in Head Start and state-funded preschool sites meet WWC standards. Findings from these studies are summarized in Table 1. The table includes a row for the outcome domain—a group of related outcome measures—studied in the research. The World of Words studies included language outcome measures that fit within the language domain.4 The effects of the program on other outcomes are unknown.  \nThe WWC effectiveness rating indicates whether the World of Words program resulted in improved outcomes for children assigned to receive the program compared with children who were not. The table also indicates whether the evidence reviewed satisfies the Department of Education’s requirements for strong, moderate, or promising tiers of evidence at the time this report was written. More information about these ratings and requirements is provided on the next page. Findingsand conclusions could change as new research becomes available.  \nTable 1. Summary of findings on World of Words program from four studies that meet WWC standards  \n\n| Outcome domain Effectiveness rating Sample Size Evidence tier Summary |  |  |  |  |\n| --- | --- | --- | --- | --- |\n| Language | Positive effects | 992 | \u003Cbr>TIER 1\u003Cbr>STRONG\u003Cbr>| The research provides strong evidence that World of Words improved student language. This assessment is based on four studies that meet WWC standards. |\n|  |  |  |  |  |\n\n\n| CHARACTERISTICS OF THE STUDY SETTING AND PARTICIPANTS |  |  |\n| --- | --- | --- |\n| Settings: Head Start and state-funded preschool sites in the United States. | Race: Asian 4% Two or More Races 5%\u003Cbr> 40%  33% 18% \u003Cbr>Black White Other/Unknown\u003Cbr>Hispanic/Latino: 18% | Female: 52%\u003Cbr>Families with incomes below the federal poverty guidelines: 94% |\n\nHOW THE WWC REVIEWS AND DESCRIBES EVIDENCE  \nThe WWC conducted a systematic review of interventions designed to improve children’s level of preparation for school and selected and prioritized studies for review using the version 4.1 Review Protocol for Preparing Young Children for School. The WWC evaluated the quality and results of the selected studies using the criteria outlined in the version 4.1 Procedures and Standards Handbooks and the accompanying Review Protocol for Preparing Young Children for School.  \nThe WWC considers each study’s research design, whether findings were statistically significant and positive, and the number of studies contributing to this report. The WWC synthesizes evidence ","cbCaijkzPgQyw0z6","https://ap.wps.com/l/cbCaijkzPgQyw0z6","pdf",473258,"English","# Did World of Words improve student outcomes?\n## Summary of findings (Table 1)\n# How the WWC reviews and describes evidence\n## Effectiveness ratings and evidence tiers","[{\"question\":\"What is the goal of the World of Words curriculum?\",\"answer\":\"World of Words aims to accelerate children’s vocabulary, concept, and science content knowledge through topic-centered conversations and shared book readings.\"},{\"question\":\"What evidence does the WWC use to evaluate World of Words?\",\"answer\":\"The WWC reviews research using its version 4.1 Review Protocol and evaluates study quality, statistical significance, and the number of contributing studies to determine effectiveness ratings and evidence tiers.\"},{\"question\":\"What were the reported effects of World of Words on student outcomes?\",\"answer\":\"Four studies meeting WWC standards found positive effects on language outcomes, earning a strong evidence tier; effects on other outcomes were not known.\"}]","World of Words - Intervention Report - Preparing Young Children for School | PDF",1792062477,23]