Enrollment
359
Middle
STATE 577
SCHOOL COMMUNITY·RAINIER PREP CHARTER SCHOOL DISTRICT·NCES 530033503533
Rainier Prep
10211 12th Ave S, Seattle, WA 98168 · (206) 494-5979 · King County
GRADES 05–08MIDDLE21-SUBURBCHARTERTITLE IREGULAR SCHOOL359 STUDENTS
Student : Teacher
14.7:1
25 FTE teachers
STATE 18.9:1
Free / Reduced Lunch
74%
266 students
STATE 51%
Community
0
0 members
Enrollment and student:teacher ratio compared against other middle schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 5 | 90 | 25% |
| Grade 6 | 90 | 25% |
| Grade 7 | 90 | 25% |
| Grade 8 | 89 | 25% |
Student demographics
64%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
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
66.9%
WA avg 58.4% . +8.9pp since 2016
Math
59.2%
WA avg 51.2% . -2.9pp since 2016
What this means: On the Smarter Balanced + WCAS, Washington's statewide test, about 67 of every 100 students at this school read and write at grade level and about 59 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 9 points since 2016, while math scores are down about 3 points.
Smarter Balanced + WCAS results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 66.9% | 59.2% |
| 2023-24 | 64.5% | 56.4% |
| 2022-23 | 60.6% | 50.3% |
| 2021-22 | 50.6% | 37.7% |
| 2018-19 | 60.8% | 61.8% |
| 2017-18 | 61.6% | 62.9% |
| 2016-17 | 58.0% | 62.1% |
% 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
OUTPERFORMING
Top 10% of WA schools after controlling for student poverty
Actual proficiency
59.0%
composite math + reading, all grades
Predicted
30.5%
based on WA schools with similar FRL share
Beats by
+28.5pp
above demographic expectation
What this means: About 59% of students here test proficient in math and reading, well above the roughly 30% typical for Washington schools with a similar share of low-income students. BeatsExpectations ranks schools against others at the same poverty level, not by raw scores, so a school can post high scores and still fall short of its prediction, or post lower scores and still beat it. This school clears its prediction by about 29 points, placing it in Washington's top 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 Rainier Prep
Rainier Prep's state test result (59.0% proficient) is higher than 5 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Rainier Prep this school | 359 | 74.1% | 59.0% |
| Washington Middle School SEATTLE | 566 | 57.2% | 43.2% |
| Aki Kurose Middle School Seattle | 817 | 56.8% | 38.9% |
| Illahee Middle School FEDERAL WAY | 655 | 76.3% | 23.8% |
| Edmonds S. Meany Middle School Seattle | 504 | 48.4% | 38.6% |
| Dimmitt Middle School Seattle | 605 | 62.3% | 27.7% |
Matched among Washington middle 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 Rainier Prep ranks
Among middle schools| Measure | This school | In Washington | In King County |
|---|---|---|---|
| State test proficiency ranked highest first | 59.0% | #57 of 294 | #36 of 76 |
| Math proficiency ranked highest first | 59.2% | #41 of 357 ▲ 7 | #30 of 76 ▲ 3 |
| Reading proficiency ranked highest first | 66.9% | #53 of 357 ▲ 4 | #30 of 76 ▲ 4 |
| 3-year test score change ranked biggest gain first | +18.9pp | #1 of 290 | #1 of 75 |
| Enrollment ranked largest first | 359 | #297 of 377 | #74 of 80 |
| Students per teacher ranked fewest first | 14.7:1 | #13 of 340 | #1 of 76 |
| Diversity index ranked most diverse first | 64.0% | #124 of 340 | #51 of 76 |
| Free and reduced lunch ranked highest share first | 74.1% | #45 of 359 | #8 of 77 |
| Enrollment change since 2017-18 ranked fastest growth first | +7.8% | #66 of 130 | #22 of 33 |
Ranked against other public middle 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
359
+15 (+4%) vs 2020
Student : Teacher
14.7:1
was 14.3:1
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 | 359 | 24.5 | 14.7:1 | 74% (266) |
| 2023-24 | 333 | 23 | 14.5:1 | 69% (229) |
| 2022-23 | 330 | 24.9 | 13.3:1 | 72% (238) |
| 2020-21 | 344 | 24 | 14.3:1 | 68% (233) |
| 2017-18 | 333 | 22.1 | 15.1:1 | 76% (252) |
| 2015-16 | 166 | 7 | 23.7:1 | 81% (135) |
Source: NCES Common Core of Data. Rows are the federal collections on file for Rainier Prep.
Since 2017-18: students up 8% (333 to 359); teachers up 11% (22.1 to 24.5).
About Rainier Prep
Rainier Prep is a small middle school found in Seattle, Washington. The school's enrollment of 359 students covers grades 5 through 8. Statewide, middle schools in Washington average about 577 students each.
The school's district is Rainier Prep Charter School District.
Black students make up a majority at Rainier Prep, at 51%. The next largest groups are 30% Hispanic, 8% Asian, 5% White, and 5% multiracial. In King County overall, about 7% of residents are Black. Pick two students at random and there is a 64% chance they belong to different racial or ethnic groups; that figure is the school's diversity index.
The school reported 24.5 full-time-equivalent teachers in 2024-25 and a ratio of 14.7:1. That is 4.3 students per teacher below the 18.9:1 average for middle schools in Washington. Free or reduced-price lunch eligibility is 74%. That is 36 points above the 38% average for public schools in King County.
Rainier Prep ranks in the top 10% of Washington schools after adjusting test results for student poverty. Actual: 59.0%. Predicted: 30.5%. Difference: 28.5 points.
Rainier Prep is located in King County, where the median household income is $124,746, 57% of adults hold a bachelor's degree or higher, and about 5% of residents live below the federal poverty line. Rainier Prep is one of 544 public schools in the county.
Beverly Park Elem at Glendale is the closest public school, about 0.2 miles away in a straight line. Other public schools within five miles number at least 8. Rainier Prep comes in 1st of 6 nearby schools on average proficiency.
Its NCES locale code is Suburb: Large: the school is in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more. Rainier Prep holds a charter, making it a public charter school.
Enrollment is up 4% from 2020-21, when Rainier Prep had 344 students, to 2024-25, when it had 359.
Topics for discussion here include science fairs, picture day, and bus routes. Anyone with firsthand experience at this school can post or comment.
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 Seattle
- Lincoln High SchoolHigh · 1,770 students
- Ballard High SchoolHigh · 1,697 students
- Roosevelt High SchoolHigh · 1,542 students
- Garfield High SchoolHigh · 1,507 students
- West Seattle High SchoolHigh · 1,479 students
- Ingraham High SchoolHigh · 1,391 students
Nearby schools
- Beverly Park Elem at Glendale0.2 mi · 411
- Innovation Heights Academy0.7 mi · 142
- Concord International School0.9 mi · 268
- Highline Public Schools Virtual Academy1.0 mi · 208
- Raisbeck Aviation High School1.0 mi · 400
- White Center Heights Elementary1.2 mi · 527
Frequently asked questions
About Rainier PrepHow many students attend Rainier Prep?
Rainier Prep enrolls approximately 359 students in grades 05-08.
What grades does Rainier Prep serve?
Rainier Prep serves grades 05-08.
How many teachers does Rainier Prep have?
Rainier Prep employs 25 FTE teachers, for a student-to-teacher ratio of 14.7:1.
What is the student diversity at Rainier Prep?
Student demographics at Rainier Prep are roughly 5% White, 30% Hispanic, 51% Black, 8% Asian, 5% Two or more.
What district is Rainier Prep in?
Rainier Prep is part of Rainier Prep Charter School District.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.