Norms Tables For Reading And Mathematics For Grades K-8 2020-2021

i-Ready Diagnostic NationalNorms Tables for Readingand Mathematics forGrades K–82020–2021Curriculum Associates Research ReportAugust 2020

i-Ready Diagnostic National Norms: Grades K–8Curriculum Associates Research Report August 2020Research OverviewThis publication features the new i-Ready Diagnostic national norms for Grades K–8. These norms are new forthe 2020–2021 school year and are based on data from the 2018–2019 school year. As is common for nationalnorms, it is expected that these norms will remain in use for a number of school years, although CurriculumAssociates will continue to monitor the norms each year to determine when new norms are needed.What are i-Ready Diagnostic norms?Norms within i-Ready provide a way for educators to compare how their students are performing relative to otherstudents across the country.How do you interpret i-Ready Diagnostic national norms?Norms are percentiles, comparing each student’s performance with a set of nationally representative samples ofstudents in the same grade level who took the Diagnostic at the same time of year. For example, a student whose fallDiagnostic norm is 90 scored better than 90% of a nationally representative group of students who took theDiagnostic in the fall.Normative scores, together with other types of scores such as i-Ready Diagnostic criterion-referenced scores (i.e.,grade-level placements for reading and mathematics and for domains) help educators gain a more complete pictureof student performance. Whereas i-Ready’s normative scores communicate how students perform compared toother students, criterion-referenced scores communicate what students know and can do against grade-levelstandards.National norms corresponding to overall scale scores are available for both the i-Ready Diagnostics for Reading andMathematics.Where are the national norms located in i-Ready?The i-Ready Diagnostic normative scores are labeled as “percentile ranks” in i-Ready and are located in various placeson the i-Ready platform, such as the Diagnostic Results (Class) report and the Diagnostic Results (Student) report.Percentile ranks are also available in the Diagnostic Results export.What dates are used for i-Ready’s norming windows?The i-Ready Diagnostic assessment has three norming windows: fall, winter, and spring. The normative percentilerank associated with a given i-Ready Diagnostic scale score will differ across normative testing windows.New for the 2020–2021 school year, the national norming windows have been slightly adjusted in recognition ofwhen districts tend to have students take the i-Ready Diagnostic assessment. The old and new norming windowdates are listed below.New Norming Window Dates (Startingwith the 2020–2021 School Year)Old Norming Window Dates (Prior to the2020–2021 School Year)Fall Norming WindowBeginning of School Year toNovember 15Beginning of School Year toNovember 30i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021Winter Norming WindowNovember 16 to March 1December 1 to March 15Spring Norming WindowMarch 2 to End of SchoolYearMarch 16 to End ofSchool Year1

How often are i-Ready Diagnostic norms updated?Consistent with well-established practices in educational assessment, the i-Ready national norms are evaluated everyyear to determine if an update is needed. The newest norms are those for the 2020–2021 school year, which arebased on student data from the 2018–2019 school year. The last update was in 2015–2016.When will i-Ready Diagnostic norms be updated again?Curriculum Associates will evaluate the 2020–2021 norms in coming years to determine if new norms are needed andwill update the norms when necessary to ensure i-Ready Diagnostic norms continue to reflect student performanceacross the nation.For more information:To learn more about i-Ready Diagnostic norms, please contact an i-Ready Educational Consultant or AccountManager, or email info@cainc.com. 2020 Curriculum Associates, LLC. (2020, August 6). i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021.(Curriculum Associates Research Report No. RR 2020-40). North Billerica, MA: Author.i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–20212

Table 1Fall i-Ready Diagnostic for Reading Percentile to Overall Score ConversionFor Diagnostics taken between the beginning of the school year and November 15Note: Analyses were based on the 2018–2019 academic year.PercentileGrade KGrade 1Grade 2Grade 3Grade 41 286 308 339 365 Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021Grade 5 559560561562563565566567568569Grade 6 574575577578579581582583584586Grade 7 591593594596598599601602604605Grade 8 6086106116126146156166186196203

81828384858687888990919293949596979899Grade 397400404408412 422Grade 471476481488496 508Grade 535538542547553 561Grade 569572576581587 595Grade 600604608613619 627i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021Grade 624627631635641 648Grade 642646650655661 669Grade 661664668672678 687Grade 673676679684689 6964

Table 2Winter i-Ready Diagnostic for Reading Percentile to Overall Score ConversionFor Diagnostics taken between November 16 and March 1Note: Analyses were based on the 2018–2019 academic year.PercentileGrade KGrade 1Grade 2Grade 31 296 322 352 450053260381436502534Grade 4 549551552553554556557558559560Grade 5 571572573574576577578579580582i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021Grade 6 584585586587588590591592593595Grade 7 603605606608609610612613614616Grade 8 6176186196216226236246256266275

81828384858687888990919293949596979899Grade 423426430437449 465Grade 508512516521528 535Grade 555558562566571 579Grade 586589592597603 611Grade 614617621625630 638Grade 634637641645652 661i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021Grade 651655659664670 679Grade 668672676681687 695Grade 681684688692698 7046

Table 3Spring i-Ready Diagnostic for Reading Percentile to Overall Score ConversionFor Diagnostics taken between March 2 and the end of the school yearNote: Analyses were based on the 2018–2019 academic year.PercentileGrade KGrade 1Grade 2Grade 31 305 332 364 751654560408468517546Grade 4 559560561563564565566567569570Grade 5 580581583584585586587588589591i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021Grade 6 591592594595597598600601603604Grade 7 610612613615616617618620621622Grade 8 6236246256276286296306316326337

81828384858687888990919293949596979899Grade 464469475482492 504Grade 529532535539544 553Grade 568571575579585 592Grade 599602606611617 625Grade 625628631636641 648Grade 645648652657663 671i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021Grade 658661665669675 682Grade 671674678682687 695Grade 681684688692698 7048

Table 4Fall i-Ready Diagnostic for Mathematics Percentile to Overall Score ConversionFor Diagnostics taken between the beginning of the school year and November 15Note: Analyses were based on the 2018–2019 academic year.PercentileGrade KGrade 1Grade 2Grade 3Grade 41 298 312 333 354 ade 5 471472473474474475476477477478i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021Grade 6 484484485486487487488489489490Grade 7 494495496496497498498499500501Grade 8 5025025035045055055075085095109

81828384858687888990919293949596979899Grade 377379382385388 392Grade 411413416420425 431Grade 443445446448452 458Grade 462464466470475 480Grade 490492494497502 508Grade 511513515517520 524i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021Grade 521524527531535 540Grade 539542546549554 558Grade 553555557560565 57210

Table 5Winter i-Ready Diagnostic for Mathematics Percentile to Overall Score ConversionFor Diagnostics taken between November 16 and March 1Note: Analyses were based on the 2018–2019 academic year.PercentileGrade KGrade 1Grade 2Grade 31 306 323 348 8424449Grade 4 466466467467468469469470470Grade 5 481482482483484485485486487i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021Grade 6 491491492493493494495495496Grade 7 500500501502503503504505506Grade 8 50750851051151251251351451511

8081828384858687888990919293949596979899Grade 392394396398401405 414Grade 431433435437440444 449Grade 455456458460462466 471Grade 476478480482486490 496Grade 501502504507511514 518Grade 517518521523526530 535i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021Grade 532534536538541544 550Grade 546548551553556559 566Grade 557559562565569574 57912

Table 6Spring i-Ready Diagnostic for Mathematics Percentile to Overall Score ConversionFor Diagnostics taken between March 2 and the end of the school yearNote: Analyses were based on the 2018–2019 academic year.PercentileGrade KGrade 1Grade 2Grade 31 313 332 355 344146460384414442465Grade 4 480480481482482483484485485486Grade 5 491492493493494495495496496497i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–2021Grade 6 498499500501501502503503504505Grade 7 505506507508509510511512513513Grade 8 51351451451551651751851952152213

81828384858687888990919293949596979899Grade 416418421424428 435Grade 447449451454458 463Grade 468471474476479 484Grade 497499501503506 513Grade 518519521523525 530Grade 532534535537539 544Grade 546548549552555 559Grade 557558561564569 575Grade 568571574577580 585Technical Note: The Relationship between the Percentile Ranks in i-Ready Reports and Percentile Ranks in this DocumentThe original norming analysis conducted by Curriculum Associates resulted in tables that provide the percentile rank associated with each iReady Diagnostic scale score. When translating these results into tables that provide the i-Ready Diagnostic scale score associated witheach percentile rank the following rules were applied. Where multiple i-Ready Diagnostic scale scores exist for a single percentile, use the lowest score corresponding for that percentile. Where a percentile exists with no corresponding i-Ready score, use the i-Ready score from the next percentile up that does have ascore.i-Ready Diagnostic National Norms for Reading and Mathematics for Grades K–8: 2020–202114

This publication features the new i-Ready Diagnostic national norms for Grades K-8. These norms are new for the 2020-2021 school year and are based on data from the 2018-2019 school year. As is common for national norms, it is expected that these norms will remain in use for a number of school years, although Curriculum