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Iowa Test Scores | Understand Your Child’s Results

The ITBS and the Iowa Assessments are scored based on your child’s age as well as the current month and grade level when the test is administered.

Here are some of the scores you will see on your child’s Iowa score report:

Standard Score (SS) or National Standard Score (NSS). The raw scores for each subtest are converted to Standard Scores that range from 80 to 400. A Standard Score indicates each student’s placement along an achievement continuum. Students fall within one of three categories for each subject: Not Proficient (NP), Proficient (P) or Advanced (A).  CLICK HERE to see a report on standards scores and interpreting proficiency on the Iowa Assessments and the ITBS. The expectation for proficiency has remained the same from the old ITBS to the new Iowa Assessments.

Grade Equivalent (GE) or National Grade Equivalent (NGE). Grade Equivalent scores represent what the average student in the indicated level might score on the ITBS. Scores range from K.0 to 13+, with the first letter or number indicating current grade (K = Kindergarten, 1 = 1st grade, etc.) and the following decimal indicating a particular month in that school year. Example: 1.7 means the seventh month of 1st grade. The Grade Equivalent scores help administrators compare each child’s learning progress over time.

National Percentile Rank (NPR). Each student’s National Percentile Rank score is calculated by comparing test performance against others within the same age range and grade level. A score in the 90th percentile means your child scored better than 90% of students on the Iowa test. Percentile rankings range from 1-99; the average rank in the U.S. is 50th percentile.

CLICK HERE to see an explanation of the information on your child’s Iowa Assessments score report.

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Tell us about your experiences

11 Responses

These seem a bit hard for third grade.


I am glad for the iowa test
I will get a hundred on the test
Thank you


In your example to explain the IOWA Assessments score report, you used 7th grader. However, the report shows grade 8. Does it mean you need to take a 8th grade for a 7th grader?


Hey…is there anywhere we can see a chart that converts raw scores into grade level equivalency? It seems from looking at some sample tests that every 2 points on the raw score equals about .3 (or 3 months) on the GE score. Am I right? (That was based on a 7th grader’s raw reading score of 230, which ranked at 7.0 GE, up to a score of 244 which translates to a GE of 8.3. I’m extrapolating from there.)

Our prep and the scores your child may score on our practice questions and tests cannot be verified as 100% accurate or verifiable to a certain grade level or ability. Due to the unknowns including test environment and administration, we cannot convert these scores in that manner.
These results and correlations can only be provided by a trained education professional and we would be irresponsible to say that scores on our prep would directly correlate to placement as the standards for grade level placement can vary significantly from State to State depending on the subject and state standards.

When will be scores for 2018 test out?


I remember taking these. I scored a 16.4 grade score equivalent for vocabulary and language skills and like a 10.1 grade score equivalent for mathematics in like 3rd grade.

I’m just assuming a 16.4 is the beginning of the second quarter of a 4th year college student?




I have a friend who’s 3rd grader just got tested and the psychologist only provided the Standard Score and Percentile ranking (no age equivalent or grade equivalent) – how can we convert these scores so the parent has a clear understanding of what these numbers mean?

Hi Kristi,

I do apologize we do not interpret testing scores here but I do recommend reaching out to the psychologist who tested the child to help you with any questions in regards to the scores.




I was given this test back in the late 1940’s and came out with a rating of approx 147….was this
a possible score, or is my memory inaccurate

Hi Sandra –

This is very possible! The Iowa Test of Basic Skills was first developed and administered in 1935 by the University of Iowa.

All the best,


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