ITBS and Iowa Assessments: Which States Use Them and How

Parents often assume the ITBS is only used in Iowa — the name suggests as much. In reality, the Iowa Assessments are administered in public schools, private schools, and Catholic school networks across the United States. Understanding where and why your state uses this test helps you interpret your child's scores correctly and prepare appropriately.

A Brief History: From ITBS to Iowa Assessments

The Iowa Tests of Basic Skills (ITBS) were developed at the University of Iowa in the 1930s, making them one of the oldest standardized achievement tests in the country. They were designed to provide a nationally norm-referenced measure of academic achievement — meaning student scores are compared to a large national sample rather than to state standards.

The test is now published as the Iowa Assessments (Forms E, F, and G) by Riverside Insights. The "ITBS" name is no longer the official product name, but it remains widely used in casual conversation, on school websites, and by parents — especially for K–8 grades. Both names refer to the same test family.

Iowa: The Home State

Illinois

Indiana, Minnesota, and Wisconsin

Private and Independent Schools Nationwide

This is perhaps the most important point for parents who live outside the Midwest: private and independent schools across all 50 states commonly use the Iowa Assessments as a national norm-referenced benchmark, even when the state's public schools do not.

If your child attends a private school and you've received a score report with NPR and Grade Equivalent scores, there is a good chance they were given the Iowa Assessments — regardless of your state. Common reasons private schools use this test:

• Long history of use makes year-over-year comparisons reliable
• Comprehensive battery (including Science and Social Studies) gives a fuller academic picture than MAP or other assessments
• Paper-based option makes administration straightforward
• National norm group allows meaningful comparison across different school types
• Useful for gifted identification and academic placement

How Private Schools Use Iowa Assessments Results

For private schools, the Iowa Assessments serve several purposes beyond accountability:

• Academic placement: Reading groups, math course tracks, and enrichment program eligibility
• Gifted program identification: NPR 90+ or 95+ is a common first criterion for gifted screening
• Parent communication: Standardized national scores give parents a clear, objective picture of where their child stands
• Longitudinal growth tracking: Schools track Standard Score (SS) growth across grades to identify students who are falling behind or accelerating
• Curriculum evaluation: Aggregate scores show whether school programs are producing expected growth in specific subjects

ITBS vs. State Tests: A Key Difference

Many parents are confused about why their child takes both the ITBS and a state test (like the PARCC, ILEARN, MCA, or SBAC). These tests measure different things:

• Iowa Assessments (ITBS): Norm-referenced — compares your child to a national sample of students at the same grade level. Answers: "How does my child compare to students across the country?"
• State tests: Criterion-referenced — measures whether your child has mastered the specific standards your state requires at their grade level. Answers: "Has my child met our state's academic expectations?"

It's entirely possible to score at the 80th percentile nationally on the ITBS while not meeting state proficiency standards, or vice versa. They measure different things with different methodologies.

Testing Windows

Schools administer the Iowa Assessments in one of two annual windows:

• Fall window: August through October, typically in September. Fall testing measures what students retained over the summer and establishes a baseline for the current school year.
• Spring window: April through May. Spring testing measures end-of-year achievement and is often used for gifted screening decisions for the following year.

What to Do With Your Child's ITBS Results

When your child's ITBS scores arrive, the first step is identifying which content areas produced the highest and lowest National Percentile Ranks. The ITBS reports separate scores for Reading, Language, Mathematics, Social Studies, and Science — a composite score tells you overall performance, but the subtest breakdown tells you where to focus. A child who scores at the 95th percentile in Reading but the 60th in Mathematics needs a very different preparation plan than one whose scores are uniformly high.

For gifted program eligibility, most districts that use the ITBS require a composite NPR at or above the 90th percentile, though some programs set different thresholds for individual subtests. Check with your district's gifted coordinator for the exact criteria — published cutoffs sometimes differ from the criteria actually applied, and some programs weight certain subtests more heavily than others.

If your child's score is close to a program threshold, consider whether the test was administered under ideal conditions. The ITBS is a group-administered, timed test — children who were ill, sleep-deprived, or anxious on test day may perform below their actual ability level. In these cases, many districts allow parents to request re-testing, particularly if the child can demonstrate a history of strong academic performance.

Grade Equivalent scores, which also appear on ITBS reports, can be motivating or misleading depending on how they are used. A 4th grader with a Grade Equivalent of 7.2 in math has not mastered 7th-grade math — they have scored as well as an average 7th grader would on the 4th-grade test. Use Grade Equivalents as broad indicators, not as placement criteria. The NPR and Standard Score are more reliable for comparing performance across years and making instructional decisions.

Talking With Your Child's School About ITBS Scores

When you receive ITBS results, scheduling a brief conversation with your child's classroom teacher is worthwhile even when scores are positive. Teachers receive score reports as well, but a parent-initiated conversation signals that you are engaged and creates an opening for the teacher to share observations that do not appear in the score data — classroom behavior, participation level, areas where the teacher has noticed particular strength or uncertainty. These observations are especially useful in districts where teacher recommendations are part of the gifted referral process.

If your child's ITBS scores are below your expectations and you believe the scores do not reflect their actual ability, ask the school about the process for academic re-evaluation. Many districts have a formal process for requesting additional assessment. Come to that conversation with concrete examples of work the child has produced at home or in class that demonstrates the ability you are concerned the test may have missed. Specific examples are far more persuasive than a general sense that the scores seem wrong.