King County · Public school
Sylvester Middle School
Key facts
- Address
- 16222 Sylvester Road SW, Burien, WA 98166
- Phone
- (206) 631-6000
- District
- Highline School District
- County
- King County
- Grades
- 6–8 (middle)
- Students (2025–26)
- 618
- Students per teacher
- 19.3
- Low-income
- 43%
- English learners
- 21%
- Special education
- 19%
- Setting
- Suburb
- Spending per student (2024–25)
- $20,980 (Washington $19,341)
Academics vs district and state 2025–26
| Measure | This school | District | State |
|---|---|---|---|
| Reading (ELA) met standard | 43% | 35% | 53% |
| Math met standard | 34% | 24% | 43% |
| Science met standard | 49% | 33% | 51% |
| Regular attendance | 76% | 67% | 74% |
| Experienced teachers 2024–25 | 58% | 69% | 78% |
| Students disciplined 2024–25 | 9.0% | 3.4% | 3.7% |
| Reading growth | 40 | below typical (50 = typical) | |
| Math growth | 43 | below typical (50 = typical) | |
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):
- Heritage language: Spanish
Students
Among Washington middle schools
Regular attendance76% · Higher than at about 6 in 10 middle schools
Low-income students43% · A larger share than at about 4 in 10 middle schools
What this means
“About 7 in 10” means 7 of every 10 Washington middle 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?