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What do you wish you knew before starting at Chief Sealth International High School?
Community prompt from u/allk12. Replies below.
Enrollment
1,184
High
DISTRICT 831 · STATE 573
SCHOOL COMMUNITY·SEATTLE SCHOOL DISTRICT NO. 1·NCES 530771001149
Chief Sealth International High School
2600 SW Thistle, SEATTLE, WA 98126 · (206) 252-8550 · King County
GRADES 09–12HIGH11-CITYTITLE IREGULAR SCHOOL1,184 STUDENTS
C-
allk12 Grade
Scored higher than 15% of Washington public high schools
- C-Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- DBeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- AThree-year trend Change in reading and math proficiency over the last three test years.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Washington public high schools
Student : Teacher
18.9:1
63 FTE teachers
DISTRICT 17.6:1 · STATE 21.6:1
Free / Reduced Lunch
52%
611 students
DISTRICT 36% · 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 | 255 | 22% |
| Grade 10 | 310 | 26% |
| Grade 11 | 313 | 26% |
| Grade 12 | 306 | 26% |
Student demographics
79%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 73% · 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
53.7%
WA avg 58.4% . +22.4pp since 2014
Math
21.6%
WA avg 51.2% . +15.2pp since 2014
What this means: On the Smarter Balanced + WCAS, Washington's statewide test, about 54 of every 100 students at this school read and write at grade level and about 22 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 22 points since 2014, while math scores are up about 15 points.
Smarter Balanced + WCAS results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 53.7% | 21.6% |
| 2023-24 | 45.3% | 18.1% |
| 2022-23 | 49.5% | 16.1% |
| 2021-22 | 47.5% | 12.6% |
| 2018-19 | 65.1% | 37.5% |
| 2017-18 | 55.7% | 31.0% |
| 2016-17 | 19.2% | 13.3% |
| 2015-16 | 13.2% | 32.9% |
| 2014-15 | 31.4% | 6.3% |
% 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
UNDERPERFORMING
Bottom 10% of WA schools after controlling for student poverty
Actual proficiency
31.6%
composite math + reading, all grades
Predicted
45.6%
based on WA schools with similar FRL share
Beats by
-14.0pp
below demographic expectation
What this means: About 32% of students here test proficient in math and reading, below the roughly 46% typical for Washington schools with a similar share of low-income students. BeatsExpectations compares each school with others at the same poverty level, not by raw scores, so a school lands here when its results trail those comparable schools, which is not the same as having low scores. A higher-scoring school can still fall in this tier if similar schools score higher still.
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 Chief Sealth International High School
Chief Sealth International High School's state test result (31.6% proficient) is higher than 0 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Chief Sealth International High School this school | 1,184 | 51.6% | 31.6% |
| Mount Rainier High School Des Moines | 1,846 | 58.8% | 32.3% |
| Franklin High School SEATTLE | 1,277 | 57.2% | 37.2% |
| Summit Public School: Atlas Seattle | 566 | 43.5% | 48.0% |
| Garfield High School SEATTLE | 1,507 | 41.2% | 53.7% |
| Meadowdale High School LYNNWOOD | 1,491 | 50.1% | 47.1% |
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 Chief Sealth International High School ranks
Among high schools| Measure | This school | In Washington | In King County |
|---|---|---|---|
| State test proficiency ranked highest first | 31.6% | #222 of 271 | #45 of 59 |
| Math proficiency ranked highest first | 21.6% | #224 of 321 ▲ 6 | #43 of 59 ▲ 1 |
| Reading proficiency ranked highest first | 53.7% | #204 of 327 ▲ 56 | #43 of 61 ▲ 6 |
| 3-year test score change ranked biggest gain first | +7.6pp | #25 of 259 | #2 of 57 |
| Enrollment ranked largest first | 1,184 | #132 of 570 | #44 of 97 |
| Students per teacher ranked fewest first | 18.9:1 | #88 of 311 | #14 of 67 |
| Diversity index ranked most diverse first | 78.7% | #9 of 316 | #5 of 67 |
| Free and reduced lunch ranked highest share first | 51.6% | #176 of 386 | #23 of 76 |
| Enrollment change since 2017-18 ranked fastest growth first | +14.0% | #45 of 136 | #10 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
1,184
+49 (+4%) vs 2020
+35% since 1990-91, when it was 874
Student : Teacher
18.9:1
was 18.3:1
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 | 1,184 | 62.8 | 18.9:1 | 52% (611) |
| 2023-24 | 1,201 | 66.2 | 18.1:1 | 56% (671) |
| 2022-23 | 1,289 | 66.5 | 19.4:1 | 63% (810) |
| 2020-21 | 1,135 | 62 | 18.3:1 | 60% (685) |
| 2017-18 | 1,039 | 57.1 | 18.2:1 | 63% (659) |
| 2015-16 | 1,173 | 61 | 19.2:1 | 61% (719) |
| 2010-11 | 1,074 | 52 | 20.6:1 | 52% (559) |
| 2000-01 | 996 | 47 | 21.2:1 | N/A |
| 1990-91 | 874 | 47 | 18.6:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Chief Sealth International High School.
Since 2017-18: students up 14% (1,039 to 1,184); teachers up 10% (57.1 to 62.8).
About Chief Sealth International High School
Chief Sealth International High School is a large high school for students in SEATTLE, Washington. Enrollment in 2024-25 was 1,184 students in grades 9 through 12. Against the 573-student average for high schools in Washington, enrollment here is 107% higher.
Chief Sealth International High School is among 107 schools run by Seattle School District No. 1, which serves 50,773 students.
Federal enrollment data show White students as the largest group at Chief Sealth International High School, at 26%. Other groups make up 25% Hispanic, 23% Black, 13% Asian, and 10% multiracial. County-wide, 55% of King County residents are White. The school's diversity index is 79%, meaning two students picked at random have a 79% chance of belonging to different racial or ethnic groups.
The school's student-to-teacher ratio is about 18.9:1, with 62.8 full-time-equivalent teachers. That is 2.7 students per teacher below the 21.6:1 average for high schools in Washington. Students eligible for free or reduced-price lunch make up 52% of enrollment. That is higher than the 38% average for public schools in King County.
allk12 grades Chief Sealth International High School a C-. The grade compares the school only with Washington public high schools, because each state gives its own test.
Chief Sealth International High School ranks in the bottom 10% of Washington schools after adjusting test results for student poverty. Actual: 31.6%. Predicted: 45.6%. Difference: 14.0 points.
Chief Sealth International High School is located in King County, where the median household income is $124,746, the share of adults with a bachelor's degree or higher is 57%, and roughly 5% of residents are in poverty. Besides Chief Sealth International High School, King County has 543 other public schools.
The shortest distance from Chief Sealth International High School to another public school is less than a tenth of a mile, to David T. Denny International Middle School. Other public schools within five miles: at least 8. Nearby schools with test data average 42.3% proficiency; Chief Sealth International High School posts 31.6%.
In the federal locale system, Chief Sealth International High School is coded City: Large, for schools inside a principal city with a population of 250,000 or more.
Enrollment is up 4% from 2020-21, when Chief Sealth International High School had 1,135 students, to 2024-25, when it had 1,184.
Community posts for Chief Sealth International High School can cover school safety, transportation, and start times. Questions from prospective families are welcome too.
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 School District No. 1
- 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
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
- David T. Denny International Middle School0.0 mi · 722
- Roxhill Elementary School0.5 mi · 289
- Sanislo Elementary School0.8 mi · 145
- Bridges Transition0.8 mi · 109
- Highland Park Elementary School0.9 mi · 300
- West Seattle Elementary School0.9 mi · 376
Frequently asked questions
About Chief Sealth International High SchoolHow many students attend Chief Sealth International High School?
Chief Sealth International High School enrolls approximately 1,184 students in grades 09-12.
What grades does Chief Sealth International High School serve?
Chief Sealth International High School serves grades 09-12.
How many teachers does Chief Sealth International High School have?
Chief Sealth International High School employs 63 FTE teachers, for a student-to-teacher ratio of 18.9:1.
How diverse is Chief Sealth International High School?
Chief Sealth International High School reports a student body of 26% White, 25% Hispanic, 23% Black, 13% Asian, 10% Two or more.
What district is Chief Sealth International High School in?
Chief Sealth International High School is part of Seattle School District No. 1.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.