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Honest take: what's the hardest part about being a student at Mount Si High School?
Community prompt from u/allk12. Replies below.
Enrollment
2,152
High
DISTRICT 1,104 · STATE 573
SCHOOL COMMUNITY·SNOQUALMIE VALLEY SCHOOL DISTRICT·NCES 530804001330
Mount Si High School
8651 MEADOWBROOK WAY SE, SNOQUALMIE, WA 98065 · (425) 831-8100 · King County
GRADES 09–12HIGH31-TOWNREGULAR SCHOOL2,152 STUDENTS
Student : Teacher
21.2:1
101 FTE teachers
DISTRICT 14.7:1 · STATE 21.6:1
Free / Reduced Lunch
13%
283 students
DISTRICT 15% · STATE 51%
Community
1
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 9 | 539 | 25% |
| Grade 10 | 577 | 27% |
| Grade 11 | 514 | 24% |
| Grade 12 | 522 | 24% |
Student demographics
47%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 50% · STATE 68% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Test scores
Smarter Balanced + WCAS 2024-25 . % Met or Exceeded StandardEnglish Language Arts
85.3%
WA avg 58.4% . +80.5pp since 2014
Math
55.1%
WA avg 51.2% . +52.9pp since 2014
What this means: On the Smarter Balanced + WCAS, Washington's statewide test, about 85 of every 100 students at this school read and write at grade level and about 55 of 100 do math at grade level. Across all Washington schools, those numbers are about 58 and 51. Reading and writing scores are up about 81 points since 2014, while math scores are up about 53 points.
Smarter Balanced + WCAS results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 85.3% | 55.1% |
| 2023-24 | 89.1% | 57.5% |
| 2022-23 | 83.1% | 52.7% |
| 2021-22 | 88.3% | 57.3% |
| 2018-19 | 87.1% | 67.7% |
| 2017-18 | 85.8% | 64.5% |
| 2016-17 | 22.2% | N/A |
| 2015-16 | 15.1% | 29.0% |
| 2014-15 | 4.8% | 2.2% |
% Met or Exceeded Standard, all students and all tested grades.
Source: Smarter Balanced + WCAS. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
66.7%
composite math + reading, all grades
Predicted
71.4%
based on WA schools with similar FRL share
Beats by
-4.7pp
below demographic expectation
What this means: About 67% of students here test proficient in math and reading, compared with the roughly 71% typical for Washington schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Washington's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Mount Si High School
Mount Si High School's state test result (66.7% proficient) is higher than 3 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Mount Si High School this school | 2,152 | 13.2% | 66.7% |
| Ballard High School SEATTLE | 1,697 | 12.7% | 60.3% |
| Woodinville HS Woodinville | 1,662 | 14.6% | 64.8% |
| Lincoln High School Seattle | 1,770 | 11.6% | 77.6% |
| Bainbridge High School Bainbridge Island | 1,208 | 10.8% | 78.8% |
| Tahoma Senior High School Maple Valley | 2,919 | 19.3% | 58.3% |
Matched among Washington high schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Mount Si High School ranks
Among high schools| Measure | This school | In Washington | In King County |
|---|---|---|---|
| State test proficiency ranked highest first | 66.7% | #13 of 271 | #7 of 59 |
| Math proficiency ranked highest first | 55.1% | #27 of 321 ▼ 7 | #17 of 59 ▼ 1 |
| Reading proficiency ranked highest first | 85.3% | #8 of 327 ▼ 4 | #6 of 61 ▼ 4 |
| 3-year test score change ranked biggest drop first | -2.6pp | #96 of 259 | #23 of 57 |
| Enrollment ranked largest first | 2,152 | #15 of 570 | #7 of 97 |
| Students per teacher ranked fewest first | 21.2:1 | #188 of 311 | #38 of 67 |
| Diversity index ranked most diverse first | 47.2% | #222 of 316 | #62 of 67 |
| Free and reduced lunch ranked highest share first | 13.2% | #375 of 386 | #67 of 76 |
| Enrollment change since 2017-18 ranked fastest growth first | +17.0% | #33 of 136 | #8 of 31 |
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
2,152
+91 (+4%) vs 2020
+160% since 1990-91, when it was 827
Student : Teacher
21.2:1
was 22.9:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 2,152 | 101.4 | 21.2:1 | 13% (283) |
| 2023-24 | 2,172 | 100.8 | 21.5:1 | 13% (279) |
| 2022-23 | 2,081 | 102.9 | 20.2:1 | 13% (271) |
| 2020-21 | 2,061 | 90 | 22.9:1 | 9% (195) |
| 2017-18 | 1,840 | 76.7 | 24.0:1 | 9% (158) |
| 2015-16 | 1,852 | 83 | 22.3:1 | 12% (224) |
| 2010-11 | 1,548 | 72 | 21.5:1 | 12% (189) |
| 2000-01 | 1,254 | 60 | 20.9:1 | N/A |
| 1990-91 | 827 | 42 | 19.7:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Mount Si High School.
Since 2017-18: students up 17% (1,840 to 2,152); teachers up 32% (76.7 to 101.4).
About Mount Si High School
Mount Si High School is a large high school in Washington, with an address in SNOQUALMIE. The school counted 2,152 students in 2024-25, covering grades 9 through 12. That puts enrollment 276% larger than the 573-student average for high schools in Washington.
Snoqualmie Valley School District serves 7,145 students across 13 schools.
The share of White students at Mount Si High School is 71%, a majority. The school is also 11% Hispanic, 9% Asian, and 7% multiracial. That is higher than the 55% White share among all King County residents. A diversity index of 47% means there is a 47% chance two randomly chosen students at Mount Si High School are from different groups.
Mount Si High School has 101.4 full-time-equivalent teachers on staff and a student-to-teacher ratio of 21.2:1. The 21.6:1 average for high schools in Washington is close to this figure. At Mount Si High School, 13% of students qualify for free or reduced-price lunch in 2024-25. The average for public schools in King County is 38%.
The school's average proficiency rate across its state test results is 66.7%. For its free or reduced-price lunch share, the predicted value is 71.4%.
For King County, Census Bureau data show the median household earns about $124,746 a year, roughly 57% of adults have a four-year degree or more, and about 5% of residents live below the federal poverty line. Counting Mount Si High School, King County has 544 public schools.
Mount Si High School is less than a tenth of a mile from Two Rivers School, its nearest public school. Mount Si High School has at least 8 other public schools within five miles. Local comparison: Mount Si High School ranks 6th of 7 nearby schools, at 66.7% versus a 72.5% average.
Mount Si High School is coded as Town: Fringe in federal locale data.
The 2020-21-to-2024-25 change in enrollment was a 4% rise, from 2,061 to 2,152. Its ratio of students to teachers was 22.9:1 in 2020-21, and 21.2:1 in 2024-25.
The Mount Si High School discussion page is a place for open houses, carpools, and field trips. You can also rate the school on this page.
King County at a glance
View full county profilePopulation
2,287,171
Census ACS
Median income
$124,746
Household, ACS
Bachelor's+
57%
Adults 25+
Poverty rate
5%
Below federal line
Schools in county
544
278,492 students
Quick facts
Related schools
Other schools in Snoqualmie Valley School District
- Timber Ridge Elementary SchoolElementary · 607 students
- Edwin R Opstad ElementaryElementary · 581 students
- Twin Falls Middle SchoolMiddle · 556 students
- Snoqualmie ElementaryElementary · 547 students
- Chief Kanim Middle SchoolMiddle · 520 students
- Snoqualmie Middle SchoolMiddle · 496 students
Other schools in SNOQUALMIE
- Timber Ridge Elementary SchoolElementary · 607 students
- Snoqualmie ElementaryElementary · 547 students
- Snoqualmie Middle SchoolMiddle · 496 students
- Cascade View Elementary SchoolElementary · 493 students
- Snoqualmie Parent Partnership ProgramCombined · 203 students
- Echo Glen SchoolHigh · 104 students
Nearby schools
- Two Rivers School0.0 mi · 56
- Snoqualmie Elementary0.3 mi · 547
- Snoqualmie Parent Partnership Program0.4 mi · 203
- Snoqualmie Middle School0.4 mi · 496
- Snoqualmie Access0.7 mi · 12
- North Bend Elementary School2.7 mi · 466
Frequently asked questions
About Mount Si High SchoolHow many students attend Mount Si High School?
Mount Si High School enrolls approximately 2,152 students in grades 09-12.
What grades does Mount Si High School serve?
Mount Si High School serves grades 09-12.
How many teachers does Mount Si High School have?
Mount Si High School employs 101 FTE teachers, for a student-to-teacher ratio of 21.2:1.
What is the student diversity at Mount Si High School?
Student demographics at Mount Si High School are roughly 71% White, 11% Hispanic, 1% Black, 9% Asian, 7% Two or more.
Is Mount Si High School public or private?
Mount Si High School is a public K-12 school, overseen by Snoqualmie Valley School District.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.