i-Ready Diagnostic National Norms

Percentile to scale score conversion tables for Reading and Mathematics (K-8)

Source: Florida DOE / Curriculum Associates (2020-2021)
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Verified Data Source

This data is extracted from the official Florida DOE i-Ready Norms Tables K-8 (2020) document. Based on 2018-2019 academic year data.

Testing Windows

Fall Window

Beginning of school year to November 15

Winter Window

November 16 to March 1

Spring Window

March 2 to end of school year

Intervention Decision Thresholds

Quick reference for identifying students who may need Tier 2/3 intervention based on Fall diagnostic scores

Reading Thresholds (Fall)

Grade <10th %ile
Intensive		 <25th %ile
Tier 2/3		 50th %ile
On Track
K < 309 < 326 341
Grade 1 < 347 < 373 403
Grade 2 < 393 < 420 460
Grade 3 < 419 < 463 502
Grade 4 < 453 < 495 533
Grade 5 < 479 < 521 558
Grade 6 < 491 < 535 573
Grade 7 < 508 < 551 590
Grade 8 < 523 < 566 607

Math Thresholds (Fall)

Grade <10th %ile
Intensive		 <25th %ile
Tier 2/3		 50th %ile
On Track
K < 313 < 325 342
Grade 1 < 340 < 358 376
Grade 2 < 369 < 387 402
Grade 3 < 390 < 409 428
Grade 4 < 410 < 433 452
Grade 5 < 425 < 450 470
Grade 6 < 434 < 460 483
Grade 7 < 444 < 470 493
Grade 8 < 450 < 478 501

Reading: Complete Percentile Tables (Fall)

Grade 1st 10th 25th 50th 75th 90th 99th
K 286 309 326 341 361 384 422
Grade 1 308 347 373 403 422 456 508
Grade 2 339 393 420 460 496 524 561
Grade 3 365 419 463 502 534 558 595
Grade 4 382 453 495 533 564 588 627
Grade 5 401 479 521 558 588 616 648
Grade 6 410 491 535 573 607 632 669
Grade 7 418 508 551 590 626 648 687
Grade 8 431 523 566 607 636 663 696

Math: Complete Percentile Tables (Fall)

Grade 1st 10th 25th 50th 75th 90th 99th
K 298 313 325 342 357 371 392
Grade 1 312 340 358 376 391 404 431
Grade 2 333 369 387 402 418 435 458
Grade 3 354 390 409 428 444 456 480
Grade 4 371 410 433 452 470 483 508
Grade 5 384 425 450 470 487 503 524
Grade 6 391 434 460 483 501 515 540
Grade 7 401 444 470 493 512 530 558
Grade 8 406 450 478 501 524 545 572

How to Use These Norms

Below 10th Percentile

Students scoring below the 10th percentile likely need intensive intervention (Tier 3). These students are significantly below grade level and require daily, targeted support.

Action: Refer for intensive intervention services

10th-25th Percentile

Students in this range typically benefit from strategic intervention (Tier 2). Small group instruction 3-5 times per week can help close gaps.

Action: Provide small group intervention

25th-75th Percentile

Students in this range are performing at or near grade level. Continue with core instruction (Tier 1) and monitor progress.

Action: Continue core instruction

Above 75th Percentile

Students above the 75th percentile are exceeding grade-level expectations. Consider enrichment opportunities to continue growth.

Action: Provide enrichment/extension

Need the Official Document?

Download the complete Florida DOE i-Ready Norms Tables document which includes Winter and Spring windows.

Download Official PDF from Florida DOE
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