Oregon

OSAS: Practice Tests and Test Dates

The official practice resources and 2026-27 testing dates for the Oregon Statewide Assessment System, from the Oregon Department of Education and its testing vendor.

Email me the OSAS practice links

The official practice resources and this year's testing dates in one place.

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Official OSAS practice tests and released tests

Free, from the state or its testing vendor. Each link opens the official site.

Practice tests

Sample & Training Tests orpt.cambiumtds.com
Students and Families (OSAS Portal) osasportal.org

Scoring guides

Grade 3 Math CAT Sample Test Scoring Guide oregon.gov
Grade 5 Math CAT Sample Test Scoring Guide oregon.gov
Grade 8 Math CAT Sample Test Scoring Guide oregon.gov
Fifth Grade Science Sample Test Scoring Guide osasportal.org
Eighth Grade Science Sample Test Scoring Guide osasportal.org
ELA Performance Task Writing Rubric - Informational (3-5) oregon.gov

OSAS test dates, 2026-27

English Language Arts, Mathematics (Grades 3-8)March 30–June 11, 2027
Science (Grades 5, 8)March 2–June 11, 2027

What to know

Grades 3-8 and 11 in English language arts and math; science in grades 5, 8 and 11.

These are statewide windows; each school schedules its own testing days inside them.

Frequently asked questions

Where can I find OSAS practice tests?

The Oregon Department of Education and its testing vendor publish them free. The main ones are: Sample & Training Tests; Students and Families (OSAS Portal); Grade 3 Math CAT Sample Test Scoring Guide; Grade 5 Math CAT Sample Test Scoring Guide. Links to each are on this page.

When is the OSAS in 2027?

English Language Arts, Mathematics (Grades 3-8): March 30–June 11, 2027. Science (Grades 5, 8): March 2–June 11, 2027. Schools pick their own days inside each window.

Source: Oregon Department of Education (oregon.gov, oregon.gov, oregon.gov, oregon.gov, oregon.gov, oregon.gov, osasportal.org), read October 8, 2026. Grades 3-8 and 11 in English language arts and math; science in grades 5, 8 and 11. The OSAS is run by the Oregon Department of Education, which is not affiliated with Dewey Smart.