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Test scores

Post Middle School · Arlington, WA
See how it ranks: all Washington schools by score · Snohomish County schools by score

Smarter Balanced + WCAS, SY 2024-25

All grades, all students. % Met or Exceeded Standard.
English Language Arts
44.4%
State avg 58.4%
District avg 50.0%
County avg 60.3%
-21.3pp since 2014-15
Mathematics
28.4%
State avg 51.2%
District avg 39.3%
County avg 52.8%
-14.8pp since 2014-15
Science
32.2%
State avg 52.2%
District avg 48.3%
County avg 54.2%

BeatsExpectations

Demographically-adjusted score · methodology
Tier
UNDERPERFORMING
Bottom 10% of WA schools after controlling for student poverty
Actual proficiency
37.1%
composite math + reading, all grades
Predicted
49.5%
based on WA schools with similar FRL share
Beats by
-12.5pp
below demographic expectation
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →

By grade, SY 2024-25

School score vs state average per tested grade.
GradeEnglish Language ArtsMathematicsScience
SchoolStaten testedSchoolStaten testedSchoolStaten tested
Grade 646.4%56.2%9634.0%50.0%70N/AN/AN/A
Grade 749.3%58.4%10833.2%50.2%73N/AN/AN/A
Grade 837.4%56.3%8018.2%47.1%3932.2%51.1%69

9-year history

All grades, all students. Post   Washington avg

English Language Arts

49662014-1550622015-1649562016-1758542017-1858642018-1950452021-2249462022-2350472023-2458442024-25
YearSchoolDistrictCountyState
SY 2024-2544.4%50.0%60.3%58.4%
SY 2023-2446.9%44.5%52.7%49.5%
SY 2022-2346.0%49.7%52.3%49.0%
SY 2021-2245.3%46.5%52.5%49.6%
SY 2018-1964.2%59.1%61.0%57.9%
SY 2017-1854.0%59.2%61.0%57.8%
SY 2016-1756.3%54.2%52.2%49.3%
SY 2015-1662.1%54.4%53.4%50.3%
SY 2014-1565.7%52.5%51.3%49.1%

Mathematics

44432014-1547462015-1646412016-1748412017-1848442018-1938312021-2239332022-2340282023-2451282024-25
YearSchoolDistrictCountyState
SY 2024-2528.4%39.3%52.8%51.2%
SY 2023-2428.4%34.9%44.0%40.4%
SY 2022-2332.8%35.1%42.5%39.2%
SY 2021-2230.9%33.7%41.2%38.0%
SY 2018-1943.6%48.6%50.2%47.7%
SY 2017-1840.6%48.8%51.0%47.9%
SY 2016-1741.1%43.1%48.5%45.8%
SY 2015-1646.0%46.4%49.1%46.8%
SY 2014-1543.3%42.5%46.9%44.0%

Science

50482017-1849642018-1945322021-2245462022-2347422023-2452322024-25
YearSchoolDistrictCountyState
SY 2024-2532.2%48.3%54.2%52.2%
SY 2023-2442.0%48.5%51.3%47.1%
SY 2022-2346.0%45.8%48.1%45.1%
SY 2021-2232.3%40.2%47.4%44.8%
SY 2018-1964.1%53.9%51.2%49.1%
SY 2017-1847.8%49.2%51.3%49.6%
SY 2016-17N/AN/AN/AN/A
SY 2015-16N/AN/AN/AN/A
SY 2014-15N/AN/AN/AN/A

Recent discussions

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How to read these scores

What is Smarter Balanced + WCAS?
Washington public-school students in grades 3 through 8 plus grade 10 take the Smarter Balanced (SBAC) assessments in English Language Arts and Math each spring. The Washington Comprehensive Assessment of Science (WCAS) is given at grades 5, 8, and 11.
What does "% Met or Exceeded Standard" mean?
It is the percentage of students at the school whose scores were rated Level 3 or Level 4 on the test. Smarter Balanced reports four performance levels; Level 3 ("Met Standard") and Level 4 ("Exceeded Standard") signal the student is performing at grade level or above. A higher number is better.
What does 44.4% mean for English Language Arts at Post Middle School?
It means about 44.4 percent of students tested at Post Middle School performed at grade level or above on the Smarter Balanced + WCAS English Language Arts test in 2024-25. The statewide average for Washington that year was 58.4%. The other students fell into the lower performance levels.
How is the state average calculated?
It is a weighted average, not a simple average of each school's number. We multiply each public school's score by how many of its students tested, add those together for all schools in Washington, and divide by the total students tested that year. This way a big school with 1,500 students counts more than a small school with 50 students, which is the right way to ask "how did the typical student do this year?". District and county averages on this page use the same method, just scoped to that district or county.
Where does this data come from?
Washington Office of Superintendent of Public Instruction (OSPI), Report Card Assessment Data on data.wa.gov. Smarter Balanced (SBAC) ELA + Math (grades 3-8 + 10/11), Washington Comprehensive Assessment of Science (WCAS) at grades 5, 8, 11. Headline metric is the cumulative Level 3 + Level 4 rate (Smarter Balanced "Met or Exceeded Standard").
How often is it updated?
Smarter Balanced + WCAS is administered once a year (spring). Results are released by the state in the summer or early fall. We refresh this page after each annual release.

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