English Language Arts
41.1%
State avg 58.4%
District avg 46.9%
County avg 45.2%
+2.9pp since 2014-15
District avg 46.9%
County avg 45.2%
+2.9pp since 2014-15
Test scores
See how it ranks: all Washington schools by score · Lewis County schools by score
Smarter Balanced + WCAS, SY 2024-25
All grades, all students. % Met or Exceeded Standard.Mathematics
28.2%
State avg 51.2%
District avg 25.7%
County avg 34.8%
-18.8pp since 2014-15
District avg 25.7%
County avg 34.8%
-18.8pp since 2014-15
Science
35.1%
State avg 52.2%
District avg 35.2%
County avg 43.4%
District avg 35.2%
County avg 43.4%
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
37.2%
composite math + reading, all grades
Predicted
35.0%
based on WA schools with similar FRL share
Beats by
+2.2pp
above 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.| Grade | English Language Arts | Mathematics | Science | ||||||
|---|---|---|---|---|---|---|---|---|---|
| School | State | n tested | School | State | n tested | School | State | n tested | |
| Grade 3 | 44.4% | 56.8% | 24 | 33.3% | 59.6% | 18 | N/A | N/A | N/A |
| Grade 4 | 27.7% | 58.1% | 13 | 29.8% | 57.8% | 14 | N/A | N/A | N/A |
| Grade 5 | 29.8% | 60.9% | 17 | 19.3% | 52.9% | 11 | 35.1% | 59.3% | 20 |
| Grade 6 | 65.9% | 56.2% | 29 | 31.8% | 50.0% | 14 | N/A | N/A | N/A |
9-year history
All grades, all students. Mossyrock Washington avgEnglish Language Arts
| Year | School | District | County | State |
|---|---|---|---|---|
| SY 2024-25 | 41.1% | 46.9% | 45.2% | 58.4% |
| SY 2023-24 | 41.3% | 43.1% | 44.6% | 49.5% |
| SY 2022-23 | 35.5% | 41.5% | 43.9% | 49.0% |
| SY 2021-22 | 34.6% | 41.4% | 45.0% | 49.6% |
| SY 2018-19 | 51.8% | 58.7% | 56.6% | 57.9% |
| SY 2017-18 | 39.5% | 50.8% | 57.0% | 57.8% |
| SY 2016-17 | 40.4% | 44.6% | 47.0% | 49.3% |
| SY 2015-16 | 39.9% | 45.5% | 44.3% | 50.3% |
| SY 2014-15 | 38.2% | 46.0% | 43.2% | 49.1% |
Mathematics
| Year | School | District | County | State |
|---|---|---|---|---|
| SY 2024-25 | 28.2% | 25.7% | 34.8% | 51.2% |
| SY 2023-24 | 34.2% | 24.8% | 29.9% | 40.4% |
| SY 2022-23 | 30.2% | 24.5% | 30.6% | 39.2% |
| SY 2021-22 | 32.7% | 30.6% | 29.5% | 38.0% |
| SY 2018-19 | 54.0% | 53.7% | 42.5% | 47.7% |
| SY 2017-18 | 43.4% | 42.5% | 43.2% | 47.9% |
| SY 2016-17 | 39.5% | 35.6% | 39.9% | 45.8% |
| SY 2015-16 | 38.4% | 39.7% | 40.1% | 46.8% |
| SY 2014-15 | 47.1% | 43.5% | 39.0% | 44.0% |
Science
| Year | School | District | County | State |
|---|---|---|---|---|
| SY 2024-25 | 35.1% | 35.2% | 43.4% | 52.2% |
| SY 2023-24 | 44.7% | 42.3% | 39.4% | 47.1% |
| SY 2022-23 | 48.7% | 37.3% | 37.1% | 45.1% |
| SY 2021-22 | 42.5% | 42.4% | 38.4% | 44.8% |
| SY 2018-19 | 33.3% | 42.0% | 45.0% | 49.1% |
| SY 2017-18 | 43.2% | 38.3% | 43.8% | 49.6% |
| SY 2016-17 | N/A | N/A | N/A | N/A |
| SY 2015-16 | N/A | N/A | N/A | N/A |
| SY 2014-15 | N/A | N/A | N/A | N/A |
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 41.1% mean for English Language Arts at Mossyrock Elementary School?
It means about 41.1 percent of students tested at Mossyrock Elementary 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.