The iReady Diagnostic Score Chart helps parents and teachers understand student performance in reading and mathematics. The chart connects a student’s scale score with national percentile information by grade and testing season. This makes it easier to see whether a result is below average, near the national average, or above average.
For the 2026–2027 school year, parents may notice a new name on school reports. Curriculum Associates is changing iReady Diagnostic to iReady Inform for both reading and mathematics. The assessment continues to provide information that can help teachers, students, and families make learning decisions.
Is iReady Inform a Different Test?
The change from iReady Diagnostic to iReady Inform is primarily a name change rather than an entirely unrelated assessment. During the transition, families may see several versions of the name:
iReady Diagnostic
iReady Inform
iReady Inform, formerly iReady Diagnostic
The assessment continues to provide reading and mathematics results that can help schools understand what students know and where additional support may be useful.
How to Read an iReady Score Chart
An iReady score chart should always be read using the correct grade, subject, and testing season.
For example, a student's Reading or Math scale score should be matched with the appropriate grade column and the correct Fall, Winter, or Spring chart. The same scale score can correspond to different percentiles depending on the student's grade and testing period.
The chart can help parents understand:
- Scale score
- National percentile
- Grade-level comparison
- Testing-season comparison
- Reading performance
- Math performance
A percentile is not the percentage of questions a student answered correctly. It describes the student's position compared with the relevant national comparison group.
iReady Math Score Charts
The iReady Math charts provide score and percentile information for students from Kindergarten through Grade 8. Parents can use the appropriate Math chart to compare a scale score with national norms for the student's grade and testing season.
Because Math scores can be interpreted differently across grades and seasons, parents should avoid using a single score without checking the corresponding chart.
iReady Reading Score Charts
The iReady Reading charts provide similar information for Reading. The available national-norm tables cover Grades K–8 and include Fall, Winter, and Spring testing periods.
Parents can use the Reading chart to understand how a student's scale score compares with the national comparison group for the appropriate grade and season.
Why Fall, Winter, and Spring Matter
iReady results are commonly reviewed during Fall, Winter, and Spring testing windows. Scores generally change as students receive instruction and develop new skills during the school year.
For this reason, a Fall score should be compared with Fall norms, while Winter and Spring scores should be compared with their respective seasonal norms. Using the wrong season can give parents an inaccurate picture of a student's performance.
Find Updated iReady Score Charts
Parents can view updated iReady score charts for Math and Reading at ReadyScores.com. The available charts include grade-level information, testing seasons, scale scores, and national percentiles.
The published national norms include percentile information for Grades K–8, helping families understand whether a student's result is below average, near the national average, or above average for the relevant comparison group.
Use the Free iReady Score Calculator
For a faster answer, use the free iReady Score Calculator on ReadyScores.com.
Enter the child’s grade, subject, testing season, and scale score. The calculator can help explain the estimated national percentile, grade-level placement, and how the result compares with national averages.
It can help answer common questions such as:
Is this a good iReady score?
What percentile is my child in?
Is the score below or above average?
What does the scale score mean?
How does the result compare with other students?
Has my child made enough progress?
The calculator can be used for Reading and Mathematics and covers the main Fall, Winter, and Spring testing periods.
About ReadyScores.com
ReadyScores.com provides resources for iReady scores, iReady Inform scores, NWEA MAP scores, STAR scores, national percentile charts, and school assessment interpretation.
The site also offers free English and German calculators. Popular tools include the iReady Score Calculator, NWEA MAP Score Calculator, APUSH Score Calculator, Time Duration Calculator, Work Hours Calculator, free Timecard Calculator, Arbeitszeitrechner, Stundenrechner, and other practical education, salary, and time tools view the updated I-Ready Diagnostic scores charts for 2026 and 2027 in Math and Reading as seen on Readyscores.com.
