King County · Public school
Chief Sealth International High School
Key facts
- Address
- 2600 SW Thistle, Seattle, WA 98126
- Phone
- (206) 252-8550
- District
- Seattle School District No. 1
- County
- King County
- Grades
- 9–12 (high)
- Students (2025–26)
- 1,178
- Students per teacher
- 18.8
- Low-income
- 52%
- English learners
- 22%
- Special education
- 17%
- Type
- Supplemental Virtual
- Setting
- City
- Spending per student (2024–25)
- $25,741 (Washington $19,341)
Academics vs district and state 2025–26
| Measure | This school | District | State |
|---|---|---|---|
| Reading (ELA) met standard | 59% | 68% | 53% |
| Math met standard | 28% | 60% | 43% |
| Science met standard | 57% | 65% | 51% |
| Regular attendance | 60% | 78% | 74% |
| 9th graders on track | 77% | 83% | 73% |
| Dual credit | 60% | 71% | 70% |
| Graduation rate (4-year) 2024–25 | 86% | 86% | 83% |
| Experienced teachers 2024–25 | 78% | 74% | 78% |
| Students disciplined 2024–25 | 3.1% | 1.9% | 3.7% |
Points are percentage points. What do these numbers mean? Source: OSPI Report Card, data.wa.gov; tests CC BY-ND 4.0, graduation CC BY-NC-ND 3.0 IGO, as published.
Programs
Dual-language and heritage/tribal language programs (2025–26):
- Dual language: Spanish
Students
Among Washington high schools
Regular attendance60% · Higher than at about 3 in 10 high schools
Low-income students52% · A larger share than at about 5 in 10 high schools
What this means
“About 7 in 10” means 7 of every 10 Washington high schools have a lower number. The band is the middle half of schools and the line is the median (the school in the middle), which is not the state average. These describe who a school serves, not how good it is. What do these numbers mean?
Test results over time
What this means
Each year a different group of students takes the tests, so look for a direction that lasts several years, not one jump. No tests in 2019–20; the 2020–21 tests were shortened and are not shown. What do these numbers mean?
Reading these numbers: test results are the share of tested students who met the state standard; growth is the median student growth percentile (50 = typical); low-income means eligible for free or reduced-price meals. Results describe students as a group, so visit and talk to families too. What do these numbers mean?