i-Ready Scores: Scale Scores, Placement, and Growth
An i-Ready Inform score report may combine achievement, placement, growth, domain information, and instructional recommendations.
The assessment was previously known as i-Ready Diagnostic. Schools and reports may continue to use both names during the transition to i-Ready Inform.
For parents:
The overall placement is only one part of the report. Review the Scale Score, testing season, domain results, percentile, and growth information before drawing conclusions.
Optional TestPrep-Online preparation:
When your school permits practice, families can review TestPrep-Online i-Ready practice packs, i-Ready preparation overview and TestPrep-Online Family Membership. Confirm the assessment, grade or level, current pack contents, access terms, and school policy before purchasing.
Which Scores May Appear?
Depending on the report, you may see:
- Scale Score;
- overall placement;
- domain placements;
- percentile rank;
- Typical Growth;
- Stretch Growth;
- progress toward a growth goal;
- Lexile measure or range for Reading;
- Quantile measure or range for Mathematics;
- projected proficiency information;
- recommended instructional priorities.
Not every report includes every measure.
What Is an i-Ready Scale Score?
The Scale Score places performance on the i-Ready measurement scale.
It is calculated from the student’s response pattern and the difficulty of the questions administered.
A Scale Score is not:
- a percentage correct;
- a classroom grade;
- a percentile;
- a simple grade-level score;
- an IQ score;
- a universal pass mark.
Scale Scores can be used to compare performance across testing periods when the same subject and compatible assessment are used.
What Is an i-Ready Placement Level?
Placement is criterion-referenced. It compares performance with defined expectations for the student’s chronological grade.
Reports may use categories such as:
- above grade level;
- mid or above grade level;
- early on grade level;
- one grade level below;
- two or more grade levels below.
The Scale Score ranges associated with those categories depend on:
- the student’s current grade;
- subject;
- testing season;
- the placement tables used by the report.
The same Scale Score can therefore have a different placement meaning for students in different grades.
What Does Early On Grade Level Mean?
Early On Grade Level generally indicates that the student has demonstrated some grade-level knowledge but has not yet reached the higher part of the on-grade-level range.
The label should be interpreted in relation to the testing season.
A beginning-of-year result and an end-of-year result with the same label may not have the same instructional meaning.
What Does Mid or Above Grade Level Mean?
This placement indicates performance within the higher portion of the grade-level range or above it.
It does not mean that the student:
- has mastered every grade-level standard;
- no longer needs instruction;
- should automatically skip a grade;
- has equal strength in every domain.
What Does One Grade Level Below Mean?
This placement suggests that the assessment identified important prerequisite skills associated with an earlier grade.
It should guide questions about support, not become a permanent description of the child.
Ask:
- Which domains contributed to the placement?
- Does classroom work show the same pattern?
- Which prerequisite skills will be taught?
- How will progress be monitored?
What Does Two or More Grade Levels Below Mean?
This label indicates a substantial gap between the measured performance and current grade-level expectations.
It does not mean that every skill is several years behind or that the child cannot learn grade-level content.
The school should review domain results, classroom evidence, testing conditions, and the need for additional assessment or intervention.
What Is a Percentile Rank?
A percentile rank compares the student’s performance with an appropriate national norm group.
For example, a percentile rank of 70 means the student scored as well as or better than approximately 70% of students in that comparison group.
It does not mean that the student answered 70% of the questions correctly.
Percentile interpretation depends on grade, subject, testing season, and the norms used by the report.
Placement and Percentile Are Different
| Measure | Main question |
|---|---|
| Placement level | How does performance compare with grade-level criteria? |
| Percentile rank | How does performance compare with students in the norm group? |
| Scale Score | Where is the student on the assessment scale? |
| Growth measure | How much progress has occurred or is expected? |
A child can have an apparently similar placement and percentile, but the two measures are calculated for different purposes.
What Is Typical Growth?
Typical Growth is an individualized annual growth target.
It reflects the average amount of growth shown by students who began at a similar level of achievement.
Typical Growth does not mean:
- the student is on grade level;
- the student has mastered the curriculum;
- every student should gain the same number of points.
A child can meet Typical Growth while remaining below grade-level expectations.
What Is Stretch Growth?
Stretch Growth is a more ambitious individualized target intended to place a student on a pathway toward grade-level proficiency.
The target depends on the student’s starting placement.
Stretch Growth should be treated as a planning goal rather than a guaranteed outcome.
Meeting the target may show substantial progress, but it does not mean that every academic need has been resolved.
Achievement and Growth Should Be Read Together
A student may:
- remain below grade level while making strong progress;
- be on grade level while showing limited recent growth;
- exceed grade-level expectations and continue to grow strongly;
- show different growth patterns in Reading and Mathematics.
Ask about both current achievement and growth over time.
What Is a Lexile Measure?
An i-Ready Reading report may include a Lexile measure or range.
Lexile measures can help educators and families identify texts that may provide an appropriate level of challenge.
A Lexile measure does not fully account for:
- interest;
- background knowledge;
- emotional maturity;
- subject matter;
- literary quality;
- illustrations;
- adult or teacher support.
It should guide book selection rather than restrict it.
What Is a Quantile Measure?
An i-Ready Mathematics report may include a Quantile measure or range.
It can help describe the approximate difficulty of mathematical skills and concepts and identify possible prerequisite relationships.
A Quantile measure should not be treated as a complete curriculum or a simple grade-equivalent score.
Why Domain Results Matter
An overall placement combines information across several skills.
Reading domains may include:
- phonological awareness;
- phonics;
- high-frequency words;
- vocabulary;
- comprehension of literature;
- comprehension of informational text.
Mathematics domains may include:
- number and operations;
- algebra and algebraic thinking;
- measurement and data;
- geometry.
Two students with the same overall placement may need different instruction.
Domain results should still be interpreted cautiously because each domain is based on fewer questions than the complete subject score.
What Is a Good i-Ready Score?
There is no universal i-Ready score that is good for every child.
Interpretation depends on:
- subject;
- chronological grade;
- testing season;
- current placement tables;
- percentile;
- previous results;
- domain performance;
- Typical Growth;
- Stretch Growth;
- classroom evidence;
- the school’s purpose for using the assessment.
Is There an i-Ready Passing Score?
There is no single national passing score.
A school or district may use local criteria for:
- intervention;
- instructional grouping;
- course placement;
- promotion;
- enrichment;
- programme eligibility.
These local thresholds should not be confused with a universal publisher-defined pass mark.
Should Parents Use Online Score Charts?
When the school permits practice, families can review TestPrep-Online i-Ready practice packs or compare options with i-Ready preparation overview. Confirm the grade or level, current pack contents, access terms, and school policy before purchasing.
Online charts can provide background information, but they can become outdated.
Before using a chart, confirm:
- school year;
- subject;
- grade;
- testing window;
- assessment name;
- placement-table version;
- whether it shows scale scores, percentiles, or placements.
The current report and the school’s explanation should take priority.
How to Read the Report
A useful order is:
- Confirm Reading or Mathematics.
- Check the testing date and season.
- Find the Scale Score.
- Review the overall placement.
- Find the percentile rank.
- Review Typical Growth and Stretch Growth.
- Examine domain placements.
- Compare with classroom evidence and previous reports.
- Ask what instruction or support will follow.
Questions to Ask the Teacher
- Which i-Ready assessment did my child take?
- Is the report using the i-Ready Inform or Diagnostic name?
- Which placement table applies?
- What does the Scale Score show?
- How should the placement be interpreted for this testing season?
- What are the domain strengths and needs?
- Has Typical Growth been met?
- What is the Stretch Growth target?
- Does the result match classroom performance?
- What instructional action will follow?
- When will the next assessment occur?
Understand school score reports
Start with School Test Scores and Results and the parent guide. Compare benchmark families on MAP Growth, Renaissance Star and i-Ready if your school uses more than one measure. Families preparing several children can review the Family Membership guide or TestPrep-Online Family Membership.