What Is i-Ready Inform?

i-Ready Inform is the new name for the adaptive Reading and Mathematics assessment previously called i-Ready Diagnostic. The name changed for the 2026–2027 school year to emphasize the assessment’s purpose: giving teachers, students, and families information they can use to plan instruction and monitor growth.

This is not a replacement test from a different company. Curriculum Associates describes i-Ready Inform as the next chapter of the same assessment, with the valid and reliable data, reports, and instructional connections schools already used. A shorter experience with fewer items and breaks is available in 2026–2027, although the shortened version may not immediately apply to every state use.

This guide explains what i-Ready Inform is, what changed, whether old Diagnostic scores are still comparable, and how to read the official 2026–2027 Math and Reading grade-level score charts.

i-Ready Inform at a glance

What Is i-Ready Inform?

i-Ready Inform is a computer-adaptive assessment designed to identify what a student currently knows in Reading or Mathematics and where additional instruction may be useful. Adaptive means the system adjusts question difficulty in real time. Correct answers can lead to more challenging items, while incorrect answers can lead to less difficult items until the assessment has enough evidence to estimate performance.

The assessment serves students in Grades K–12. Curriculum Associates’ family guidance says students may complete i-Ready Inform at the beginning of the year and up to two more times during the school year. Schools decide the schedule and how results fit into instruction.

i-Ready Inform is different from i-Ready Personalized Instruction. Inform is the assessment. Personalized Instruction is the lesson pathway, often called My Path, that may use assessment results to match practice with student needs. A school can use one or both products.

The assessment is intended to answer several practical questions:

• What skills has the student likely developed?
• Which concepts are ready for instruction?
• Where are important prerequisite gaps?
• How does current performance align with grade-level expectations?
• How does the student compare with same-grade students nationally?
• How much progress has occurred since the prior administration?

No single assessment should define a student. Teachers should interpret Inform results alongside classroom work, conversations, unit assessments, observations, accommodations, language background, and prior data.

How does the adaptive assessment work?

Every student does not receive an identical form. The assessment follows a designed test flow and chooses items based partly on the student’s responses. This helps it locate performance below, at, or above the enrolled grade without forcing every student through a very long fixed test.

Questions can feel difficult even when the student is performing well. The system needs both correct and incorrect responses to locate the edge of what the student can do. Families should not coach, explain items, or supply answers during the assessment because that changes the evidence.

Students should work carefully, use approved tools and accommodations, take available breaks as directed, and continue even when some questions are unfamiliar. If a student rushes or guesses through many items, the score may underestimate current knowledge. Educators can review testing behavior and other evidence before deciding how much confidence to place in the result.

i-Ready Inform Scores Explained

One report can contain several kinds of scores. They are related, but they do not answer the same question.

Scale score

The scale score places performance on a common 100–800 continuum used in the official placement tables. It is not a percentage correct. A score of 500 does not mean 50 percent, 500 questions, or automatically “fifth-grade work.”

Grade-level placement

Placement compares the scale score with grade-specific criteria. Relative labels can include Above Grade Level, Early/Mid/Late On Grade Level, One Grade Level Below, Two Grade Levels Below, or Three or More Grade Levels Below. Absolute placements describe the grade level associated with performance.

The student’s chronological grade is essential because the cut ranges overlap. Two students can earn the same scale score and receive different placements.

Percentile rank

Percentile rank compares the student with a nationally representative group of students in the same grade who tested at the same time of year. A 60th percentile rank means the score was as high as or higher than approximately 60 percent of the comparison group; it does not mean 60 percent correct.

Domain scores

Domains break overall performance into parts. Mathematics can include Number and Operations, Algebra and Algebraic Thinking, Measurement and Data, and Geometry. Reading can include foundational skills, Vocabulary, and Comprehension domains, depending on grade and test flow.

Typical Growth and Stretch Growth

Typical Growth is an individualized annual growth benchmark based on students with similar starting scores and grade levels. Stretch Growth is a more ambitious but attainable target intended to help more students move toward proficiency. Neither is a universal number of points for every child.

Lexile and Quantile measures

Reading reports may include a Lexile measure connected to reading difficulty, while Mathematics reports may include a Quantile measure connected to mathematical skills and concepts. These are separate frameworks, not replacements for the i-Ready scale score.

For a complete walkthrough of every field, use our guide to reading an i-Ready Inform/Diagnostic report.

i-Ready Inform vs i-Ready Diagnostic

The safest summary is new name, shorter available experience, continued scoring and instructional purpose. It is inaccurate to describe i-Ready Inform as an unrelated replacement assessment. It is also incomplete to say “only the logo changed,” because the 2026–2027 experience includes fewer items and breaks and additional reporting improvements.

Our focused comparison, i-Ready Inform vs i-Ready Diagnostic: What Changed?, provides a deeper feature-by-feature explanation.

Did i-Ready Diagnostic Change Its Name?

Yes. Starting with the 2026–2027 school year, i-Ready Diagnostic changed its name to i-Ready Inform for Reading and Mathematics. Curriculum Associates announced the change in October 2025 and rolled the name out fully for 2026–2027.

The word “Diagnostic” sometimes led families to think of a medical diagnosis or a one-time label. “Inform” more directly communicates the assessment’s intended function: informing instructional decisions, conversations, goals, grouping, and support.

During the transition, families may see both terms:

• older reports or school documents may say i-Ready Diagnostic;
• current 2026–2027 materials may say i-Ready Inform;
• teachers may use “Diagnostic” conversationally out of habit; and
• search results and state documents may still use the older name.

These references generally point to the same core adaptive assessment system unless the document clearly identifies another i-Ready product.

Are i-Ready Inform Scores the Same as Diagnostic Scores?

i-Ready Inform continues the i-Ready Diagnostic scale-score and placement system, so the scores are intended to support continuity rather than start a brand-new unrelated scale. Curriculum Associates describes Inform as maintaining the valid, reliable data and reports educators expect.

That does not mean two test administrations will produce the identical number. Scores can change because a student learned, forgot, rushed, concentrated differently, encountered different adaptive items, or experienced ordinary measurement variation. A shorter administration can also have a different testing experience while preserving the assessment’s intended accuracy.

Use these rules when comparing an older Diagnostic score with a newer Inform score:

1. Compare the same subject: Reading with Reading or Math with Math.
2. Compare the same score type: overall with overall, not overall with a domain.
3. Record the student’s grade and testing season.
4. Use the official table for the school year shown on the report.
5. Review whether the assessment was completed with valid effort and required accommodations.
6. Interpret the amount of growth with Typical and Stretch Growth rather than inventing a universal point target.

National norms can be updated even when the scale continues. A scale score may therefore remain the same while its percentile rank changes under a newer norm sample. Our old-versus-new i-Ready percentile guide explains that distinction.

i-Ready Inform Score Chart 2026–2027

The chart below combines Early, Mid, and Late On Grade Level into one span for each rostered grade. Mathematics uses the official Overall Placements and Integrated table; Reading uses the Overall table.

*High-school Math values above use the Integrated reporting option. Schools using a Traditional pathway must consult the separate Algebra 1, Geometry, and Algebra 2 tables in the official PDF.

This is a placement chart, not a percentile table. Placement compares performance with grade-level criteria. Percentile compares performance with same-grade students in the same season. The score chart also does not replace domain information or teacher judgment.

The chart shows why the same number can mean something very different by subject. For example, 500 is within the Math on-grade range for Grade 5, but it is below the Reading on-grade range of 581–640 for a fifth grader. Never use a Math range to interpret Reading.

i-Ready Inform Math Scores by Grade

The Mathematics Overall score summarizes performance across mathematical content. Depending on grade and reporting, domains can include:

• Number and Operations;
• Algebra and Algebraic Thinking;
• Measurement and Data; and
• Geometry.

Math on-grade ranges overlap across rostered grades because placement is grade-specific. A score of 500 is on grade level for Grades 3–6 in the current Overall/Integrated table, but its detailed placement changes:

• Grade 3: Late Grade 3;
• Grade 4: Mid Grade 4;
• Grade 5: Mid Grade 5; and
• Grade 6: Early Grade 6.

This overlap does not mean those students should receive the same course or identical instruction. The grade-level curriculum and domain profile remain different.

For Grades K–8, begin with the rostered-grade row and locate the overall score. For Grades 9–12, confirm whether the account uses Integrated or Traditional reporting. Traditional pathway tables organize placement around Algebra 1, Geometry, and Algebra 2, so a generic high-school chart may not match the school report.

After identifying placement, look at domains. An overall score inside the on-grade span can coexist with a lower Geometry result or a stronger Number and Operations result. Instruction should respond to that pattern rather than treating the overall number as a complete curriculum map.

Our current i-Ready Diagnostic/Inform scores-by-grade guide provides detailed examples for Math scale scores 400, 450, 475, 500, 525, 550, and 600.

i-Ready Inform Reading Scores by Grade

The Reading Overall score combines evidence across age-appropriate reading domains. Reports may include:

• Phonological Awareness;
• Phonics;
• High-Frequency Words;
• Vocabulary;
• Comprehension of Literature; and
• Comprehension of Informational Text.

Not every student receives a meaningful placement in every foundational domain. Older students can test out of some areas when the assessment has sufficient evidence that those skills are secure. The report’s label and teacher guidance should control interpretation.

Reading on-grade spans rise more sharply than the Math spans in several grades. For example:

• Grade 2 Reading on grade level: 489–560;
• Grade 3: 511–602;
• Grade 4: 557–629;
• Grade 5: 581–640;
• Grade 8: 620–684; and
• Grade 12: 668–800.

A lower Vocabulary result does not automatically mean every reading skill is low. A student may decode well but need more academic language, or have strong vocabulary with weaker phonics or comprehension. Use the domain profile to select practice.

Reading reports can also include a Lexile measure, but Lexile and i-Ready scale scores are not interchangeable. Lexile describes the relationship between reader ability and text complexity within the MetaMetrics framework; the i-Ready scale score drives i-Ready placement and growth reporting.

What do the placement labels mean?

Above Grade Level

The score is above the on-grade criteria for the student’s rostered grade. Review domain evidence and classroom performance before making acceleration decisions. Above grade level does not mean every future skill is mastered.

Early, Mid, or Late On Grade Level

The student’s result falls within the current grade’s criterion range. Early, Mid, and Late describe progress through that band; they are not the fall, winter, and spring testing seasons. A student can receive Early On Grade Level in spring or Late On Grade Level in fall.

One Grade Level Below

The result aligns more closely with the previous grade’s performance range. Instruction should address prerequisite needs while preserving access to current grade-level work.

Two Grade Levels Below

The result indicates a larger gap between current performance and grade-level criteria. Teachers should identify the most important prerequisite skills and monitor the response to targeted support.

Three or More Grade Levels Below

This broad label can contain students with different profiles. The domain scores and instructional recommendations are essential; the label alone is not precise enough to plan an intervention.

How are percentiles different from the score chart?

The 2026–2027 placement ranges are criterion-referenced. They answer, “How does this performance align with grade-level expectations?” Percentiles are norm-referenced. They answer, “How does this score compare with students in the same grade and season nationally?”

A scale score can keep the same placement while its percentile changes between fall and spring because the comparison group also grows. Likewise, a student can gain scale-score points yet remain in the same placement band. That can still represent meaningful progress.

When do students take i-Ready Inform?

Schools can administer i-Ready Inform up to three times during the academic year. These windows are commonly described as beginning of year (BOY), middle of year (MOY), and end of year (EOY), although a district may use different names or dates. The windows create checkpoints rather than three separate grading events.

The first administration establishes a baseline. It helps teachers identify the student’s current placement, domain strengths, prerequisite needs, and starting point for growth. The middle administration shows whether instruction and intervention are moving learning in the intended direction. The final administration summarizes progress across the year and can inform transition planning for the next grade.

Season matters when interpreting a result. A third grader who earns the same scale score in fall and spring has the same location on the vertical scale, but the percentile may differ because the national comparison group has had months to learn. Placement expectations can also be discussed differently as the year progresses. That is why a copied score without the subject, grade, and testing window is incomplete information.

Schools should provide appropriate conditions for every administration: enough time, a quiet environment, normal approved accommodations, and breaks that follow local guidance. Families can help by supporting sleep, breakfast, attendance, and a calm attitude. Intensive last-minute test preparation is unnecessary. The goal is an accurate picture of what the student can do independently, not the highest number obtainable with coaching.

What is a good i-Ready Inform score?

There is no single score that is “good” for every child. A useful result must be interpreted against the student’s rostered grade, subject, testing season, prior result, and learning needs. The on-grade span in the official table is a reasonable first reference, but it is not the only indicator of success.

For one student, moving from two grade levels below to one grade level below can represent substantial and instructionally important progress even though the new result is not yet on grade level. For another student already above grade level, a smaller scale-score increase may still reflect appropriate growth because the assessment is measuring harder content. A student can also meet a growth target without changing placement labels, since each label covers a range of scores.

A balanced definition of a good result asks four questions:

• Placement: Is the student on, above, or below the criteria for the rostered grade?
• Growth: How much progress occurred from the student’s own baseline, and how does it compare with Typical and Stretch Growth?
• Domain profile: Which specific skills are strong, developing, or in need of targeted support?
• Classroom evidence: Does the result agree with daily work, teacher observations, curriculum assessments, and other measures?

If one assessment result differs sharply from the student’s usual performance, investigate before drawing a conclusion. Rushing, long pauses, fatigue, anxiety, technology problems, misunderstood directions, illness, or a missing accommodation can affect the evidence collected. The appropriate response is to review the test session and the wider body of evidence with the teacher—not to label the child from one number.

How should families read an i-Ready Inform report?

1. Check the subject and date. Confirm Reading or Math and the testing window.
2. Read the overall scale score. Treat it as a location on the scale, not percent correct.
3. Read placement. Use the exact rostered grade and current official table.
4. Read percentile. Remember that it is a same-grade, same-season comparison.
5. Inspect every domain. Look for strengths and needs hidden by the overall number.
6. Review growth. Compare with the baseline and individualized goals.
7. Check testing validity. Consider rushing, interruptions, illness, anxiety, language access, and accommodations.
8. Ask what happens next. The most valuable interpretation ends with an instructional plan.

What happens after i-Ready Inform?

Teachers can use the results to plan whole-class, small-group, and individual instruction; select prerequisite supports; set growth goals; and connect students with appropriate resources. If the school uses i-Ready Personalized Instruction, results may help build the student’s My Path.

A below-grade placement should not remove all grade-level learning. A practical plan combines access to important current-grade ideas with targeted prerequisite instruction. An above-grade placement should lead to depth and appropriate challenge, not automatic skipping without additional evidence.

Families can support progress through consistent attendance, reading, mathematical conversation, careful lesson completion, and communication with teachers. They should not search for actual assessment questions or coach during an Inform administration.

Common misunderstandings

• “Inform is a completely new test.” It is the renamed continuation of i-Ready Diagnostic.
• “Only the name changed.” A shorter 2026–2027 experience with fewer items and breaks is also available.
• “The shorter assessment means easier scores.” Fewer items do not make the scale a percent-correct test; the assessment is designed to maintain accurate, actionable results.
• “A 500 is fifth grade.” Placement depends on subject and rostered grade.
• “On grade level means average percentile.” Criterion placement and national percentile answer different questions.
• “Early On Grade Level means a fall test.” Early, Mid, and Late are placement bands, not seasons.
• “One report diagnoses a learning disability.” i-Ready Inform is not a medical or special-education diagnosis.
• “Every high-school Math chart is identical.” Integrated and Traditional pathways require different tables.

Frequently asked questions

Is i-Ready Inform replacing i-Ready Diagnostic?

The Inform name replaces the Diagnostic name beginning in 2026–2027, but Curriculum Associates presents it as the same assessment system with continued scores, reports, and instructional insights—not an unrelated product.

Is i-Ready Inform shorter?

Yes. A shorter version with fewer items and breaks is available in 2026–2027. Curriculum Associates notes that it may not immediately apply to every state use.

Does i-Ready Inform still use scale scores?

Yes. The official 2026–2027 placement tables use scale-score ranges from 100 to 800.

Are Reading and Math scores comparable?

They use the i-Ready scale system, but they have different placement cut ranges. Do not use a Math chart to interpret Reading or compare the numbers as if the subjects were identical.

Can old Diagnostic and new Inform scores be placed on one growth timeline?

They are designed for continuity. Compare the same subject and score type, use the school-year report, and ask the school how the transition is represented in its data system.

Why is my child’s percentile different if the scale score is similar?

Percentile depends on grade, testing season, and the current national norm sample. Placement and percentile can change differently.

Is the 2026–2027 chart a percentile chart?

No. It lists on-grade placement ranges. Percentile tables are separate.

What if the score seems too low?

Compare it with domains, prior results, classroom work, and testing conditions. Ask whether a Rush indicator or access problem affected validity. Retesting should follow school procedures, not be used simply to chase a higher number.

Where can I find a complete 2026–2027 guide?

See our i-Ready Inform & Diagnostic Guide 2026–2027 for deeper coverage of placement, growth, reports, testing windows, and parent questions.

Bottom line

i-Ready Inform is the 2026–2027 name for i-Ready Diagnostic. It remains a K–12 adaptive Reading and Mathematics assessment intended to turn student responses into useful instructional information. The shorter experience and updated reports refine the product, but the scale-score, placement, percentile, domain, and growth concepts remain central.

To interpret a result accurately, always use the correct subject, rostered grade, score type, school-year table, testing season, and high-school Math pathway. Read the overall number with domains and growth, then connect the result to classroom evidence and a specific next step.

Official sources

• Curriculum Associates: i-Ready Inform name change and shorter assessment
• Curriculum Associates: 2026–2027 i-Ready product updates
• Curriculum Associates: i-Ready family resources and Inform overview
• Curriculum Associates: assessment-leader resources, scores, placements, and norms
• Curriculum Associates: 2026–2027 Grades K–12 Scale Score Placement Tables