Best Standardized Test for Homeschool in Minnesota: Iowa, Stanford, and MAP Compared

Minnesota law requires a nationally norm-referenced standardized test — but it does not tell you which one to use. That decision is yours entirely, and there are real differences between the options that affect cost, convenience, detail of results, and how well the test fits your child's learning profile.

Here is a direct comparison of the tests Minnesota homeschool families use most, what each one is good for, and how to access them.

What Minnesota Law Requires (the Baseline)

Before comparing tests, it helps to know exactly what the law specifies. §120A.22 Subd. 11 requires:

• A nationally norm-referenced standardized test
• Administered annually for children ages 7 through 17
• Producing results that can identify whether a child scores at or below the 30th percentile (which triggers a separate evaluation requirement)

That is the full legal specification. The test must be nationally standardized and norm-referenced. Everything else — which test, who administers it, where it's given, and what you do with the results — is up to you.

Iowa Assessments (formerly Iowa Tests of Basic Skills)

Best for: most Minnesota homeschool families

The Iowa Assessments are the most commonly used test among Minnesota homeschoolers. They are nationally normed, widely recognized, and available through multiple channels. Results are detailed and provide grade equivalent scores, standard scores, and national percentile ranks across core subject areas.

What it covers: Reading, language arts, mathematics, social studies, science, and sources of information. The full battery provides a total composite score that directly satisfies the total battery score requirement under Minnesota law.

How to get it in Minnesota:

• University of Minnesota Statewide Testing Program (MSTP): The MSTP offers Iowa Assessments (Form E) directly to homeschool families. Tests are administered at designated sites across the state. This is the most accessible option for families who want in-person proctored administration without going through a private provider.
• Seton Testing Services, BJU Press, and similar homeschool testing providers: These organizations sell test materials and provide scoring for home administration. Cost typically ranges from $25–$60 depending on grade level and whether you want detailed scoring reports.
• Co-op group testing: Many Minnesota co-ops organize group Iowa Assessment testing days. This reduces per-student cost and removes the parent from the administrator role.

Typical cost: $25–$75 depending on the provider and administration method.

Results turnaround: 2–4 weeks for mail-in scoring; some online providers offer faster turnaround.

Stanford Achievement Test (SAT-10)

Best for: families using the MSTP or wanting a second nationally recognized option

The Stanford Achievement Test is the other test offered through the University of Minnesota's Statewide Testing Program alongside Iowa Assessments. It has a long track record and provides robust national percentile data.

What it covers: Reading, mathematics, language, science, and social science. Like Iowa, it produces a total battery composite score.

How to get it in Minnesota:

• Available through the MSTP at the University of Minnesota
• Also available through private providers such as Bayside School Services and Seton Testing

Typical cost: Similar to Iowa Assessments — $30–$65 depending on the provider and format.

How it compares to Iowa: Both are solid, well-normed assessments. Iowa Assessments are slightly more common among Minnesota homeschool families and have broader provider availability. The Stanford is equally valid for legal compliance purposes. If you're using the MSTP, you'll have the option of either.

NWEA MAP (Measures of Academic Progress)

Best for: families connected to co-ops or learning centers with MAP access, or students who need adaptive testing

MAP is a computer-adaptive test — it adjusts difficulty in real time based on how a student is responding. This makes it very effective at identifying a child's actual performance level regardless of grade placement, which is particularly useful for students who work above or below grade level.

What it covers: Reading, mathematics, language usage, and science (science not available at all levels).

How to get it in Minnesota:

• MAP is not available for direct purchase by individual families. It's administered through organizations that have a licensing agreement with NWEA.
• Some Minnesota homeschool co-ops, learning pods, and microschools have MAP access. If you're connected to a group that administers MAP, this is a strong option.
• Some public school districts in Minnesota offer MAP to homeschool students as part of their nonpublic student services — worth asking your district about.

Typical cost: Varies by provider. When available through a co-op, often $20–$50 per test session.

Limitation: Not available directly to individual families. If you don't have access through a co-op or learning center, another test is more practical.

California Achievement Test (CAT)

Best for: budget-conscious families or those who prefer full home administration

The CAT is one of the most widely used tests for home administration. It is nationally normed, accepted in all states that require norm-referenced testing, and available directly from several providers without going through a testing center.

What it covers: Reading, language arts, mathematics, science, and social studies. Available in multiple levels aligned to grade ranges.

How to get it in Minnesota:

• Available directly through providers such as Christian Liberty Press (CAT Form E) and Bayside School Services
• Can be ordered online, administered at home, and returned by mail for scoring

Typical cost: $25–$50 depending on the provider and grade level.

Home administration: If you choose home administration, you must follow the standardized administration procedures exactly — timed sections, appropriate conditions, no assistance. Deviating from the protocol compromises the normative comparison.

Limitation: Some families find the home-administered format creates more stress than a neutral third-party administration. If your child tests better without a parent in the room, this may not be the best fit.

Woodcock-Johnson Tests of Achievement

Best for: students with learning differences, testing anxiety, or who need a detailed diagnostic profile

The Woodcock-Johnson is an individually administered test given one-on-one by a licensed examiner. It provides exceptionally detailed diagnostic information — far more than a group-administered test — and is frequently used by educational psychologists and special education evaluators.

What it covers: Oral language, broad reading, broad mathematics, written language, academic knowledge, and several composites. The individual administration allows the examiner to adapt pacing and observe qualitative factors that group tests cannot capture.

How to get it in Minnesota:

• Must be administered by a licensed psychologist or educational evaluator
• Available through private educational psychologists, pediatric neuropsychologists, and some educational therapy practices across the Twin Cities and greater Minnesota

Typical cost: $500–$1,500 or more as part of a full evaluation. Significantly more expensive than group or home-administered tests.

When it makes sense: If your child has a known or suspected learning difference, testing anxiety severe enough to compromise standardized test performance, or if you're in the process of getting an evaluation anyway (for example, because of a prior below-30th-percentile result), the Woodcock-Johnson gives you detailed actionable data that the group tests don't. The cost is higher, but so is the diagnostic value.

Which Test Should You Choose?

For most Minnesota homeschool families, Iowa Assessments through the MSTP or a reputable provider is the most practical choice. It's nationally recognized, well-normed, widely used in Minnesota, available through multiple channels, and provides the total battery score that Minnesota law references in its 30th percentile rule.

If your child has learning differences or you anticipate a below-30th-percentile result and want to be proactive, adding a Woodcock-Johnson evaluation from a private psychologist gives you both the legal compliance documentation and the diagnostic information you'd need anyway.

If your co-op or learning center has MAP access, that's also an excellent option — the adaptive format gives a more precise picture of where a child actually performs.

After the Test: What You Keep and What You File

Regardless of which test you use, keep the score reports. You are not required to submit test scores to your superintendent. Test scores are private. The requirement is to test — the results belong to you.

If a score falls at or below the 30th percentile, that triggers an additional evaluation requirement under Minnesota law, but it does not change your right to continue homeschooling.

Maintain a testing log that records the test name, the date administered, the grade level tested, and the composite percentile result for each year. If you're building a complete compliance record — one that would hold up if a superintendent or court ever asked to see it — the Minnesota Legal Withdrawal Blueprint includes documentation templates that integrate your annual testing records with your subject instruction logs and Statement of Assurance filings.

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