Cascadia Elementary
Seattle, WA · Grades K–5
Seattle-Tacoma-Bellevue, WA
NeighborhoodDecoded Rank
Adjusted for school context
Context-adjusted ranking withheld
Seattle-Tacoma-Bellevue, WA schools
Achievement Rank
Raw test performance
Top 5% achievement
#1 of 674
Seattle-Tacoma-Bellevue, WA schools
Rank shift not available — this school doesn't have a ranking to compare against.
Typical Profile
This school admits students selectively, so a context-adjusted ranking isn't published for it. Test results and outcomes are still shown below.
Data confidence:High331 students tested 7 years99% participation
Confidence is computed from sample size, year coverage, and participation rate. Higher confidence means the rank shift is stable across years and not driven by a single small cohort.
- Tested students: total students with valid scores across all reported years.
- Years of data: number of school years included. More years smooths year-to-year noise.
- Participation: share of enrolled students who took the assessment. Low participation can bias scores.
Why trust this?- Public data sources
- Context-adjusted model
- Confidence shown
- Methodology published
This score uses state assessment data, NCES enrollment data, and Census ACS 5-year neighborhood data. The Decoded Rank adjusts for school context — student demographics, ELL/SPED service rates, and the socioeconomic profile of the surrounding tract — and shows how the school performs relative to expectation, not in absolute terms.
SchoolDecoder is one signal, not a verdict. Decoded Rank is a context-adjusted residual, not a causal claim about teaching quality. See full methodology →
Strongest Subjects (Decoded)
Decoded rank first; achievement rank in parentheses. Sorted by decoded rank, best first. Science is shown for reference only and is not part of any rank, tier, or composite.
Science
2023 proficiency97.7%meeting standard
Tested gradeGrade 5
129 tested
202397.7%
Shown for reference only — science is not part of any rank.
All Rankings
How this school ranks across the metro, state, and among demographic peers.
| Scope | Achievement | Decoded | Shift |
|---|
Resource context
School inputs, not ranking points
These fields describe the school and surrounding neighborhood. They help readers interpret the page, but this is not a dollar-by-dollar or ratio-by-ratio scorecard and the fields here are not components of the Decoded Rank.
- Enrollment
- 474
- Free/reduced-price lunch
- 7.2%
- Student-teacher ratio
- 19.8:1
- Locale
- City, large
- School type
- Regular public school
- Enrollment model
- Neighborhood attendance area
- Neighborhood median income
- $130,855ACS tract proxy
- Neighborhood poverty
- 4.9%ACS tract proxy
- SES index
- 88.0
- Assessment data year
- 2023
- CCD year
- 2022
- ACS vintage
- 2020-2024
Performance Spread
How students are distributed across the four state-assessment proficiency levels — L1: below standard, L2: approaching, L3: meets (proficient), L4: exceeds. This describes the shape of results at the school, not their height.
Students at this school cluster closely on the proficiency ladder.
- Level 1 — Below standard1%
- Level 2 — Approaching standard4%
- Level 3 — Meets standard (proficient)10%
- Level 4 — Exceeds standard84%
Performance Spread measures how evenly students are distributed across the L1..L4 proficiency ladder, treating the levels as an ordered scale (L1=1, L2=2, L3=3, L4=4) and weighting each by its student share. A school where most students cluster at one level has a TIGHT spread; a school split between the bottom and top has a WIDE or BIMODAL spread. Bimodal fires only when BOTH tails are non-trivial AND the middle is relatively hollow (pct_L1 ≥ 15, pct_L4 ≥ 25, pct_L2 + pct_L3 ≤ 60). It describes shape — NOT how high the school's scores are. Methodology
Nearby Schools
Sorted by distance. Both rank columns shown so you can compare quickly.
- Robert Eagle Staff Middle School0.2 mi
- Daniel Bagley Elementary School0.7 mi
- Olympic View Elementary School0.8 mi
- Greenwood Elementary School1.2 mi
- Viewlands Elementary School1.3 mi
| School | Rating | Achievement | Decoded | Shift | Story | Confidence |
|---|---|---|---|---|---|---|
| Robert Eagle Staff Middle School | #172 | #112 | Typical Profile | High | ||
| Daniel Bagley Elementary School | #93 | #64 | ★Strong by Both Measures | High | ||
| Olympic View Elementary School | #313 | #432 | Typical Profile | High | ||
| Greenwood Elementary School | #44 | #81 | ★Strong by Both Measures | High | ||
| Viewlands Elementary School | #237 | #191 | Typical Profile | High |
Similar Schools
Schools with comparable demographics, income, and size. Both rank columns shown for direct comparison.
| School | Rating | Achievement | Decoded | Shift | Story | Confidence |
|---|---|---|---|---|---|---|
| Woodward Middle School | #5 | #4 | ★Strong by Both Measures | High | ||
| Sonoji Sakai Intermediate | #2 | #1 | ★Strong by Both Measures | High | ||
| Pioneer Elementary School | #196 | #381 | Typical Profile | Medium | ||
| Sherman Elementary School | #143 | #420 | High Scores, Context Matters | High | ||
| Tehaleh Heights Elementary School | #41 | #89 | ★Strong by Both Measures | High |
Historical Ranks
Year-by-year decoded and achievement ranks. Pandemic-affected years are excluded — we don't interpolate scores across the gap.
| Year | Achievement | Decoded | Shift |
|---|---|---|---|
| 2023 | Excluded | ||
Note: assessment transitions (where a state changes its test) are footnoted on the methodology page; trends are not computed across breakpoints.
Trajectory
Not used in the Decoded Rank — shown for context only.
Not enough years yet
Trajectory will appear once we have two or more years of rankings for this school.
How this works: we fit a linear trend across the available years of Decoded percentile, then bucket the slope into a direction. Wide confidence intervals (uncertain trends) collapse to Holding steady. See the methodology page for thresholds.
Cohort Progression
Kids who started 3rd grade here in 2017 lost 3 proficiency points by 5th grade — declining, versus a metro median of about 0/yr.
Based on 7 cohorts across math + ELA.
Learning rate: -2.3 proficiency points/yr (95% CI -5.9 to 1.3)
| Cohort | 2015 | 2016 | 2017 | 2018 | 2019 | 2022 | 2023 | Slope |
|---|---|---|---|---|---|---|---|---|
| ELA · started 5th in 2015 | G5 381 | — | ||||||
| ELA · started 4th in 2015 | G4 386 | G5 380 | -6.2 | |||||
| ELA · started 3rd in 2015 | G3 390 | G4 382 | G5 386 | -1.9 | ||||
| ELA · started 3rd in 2016 | G3 387 | G4 384 | G5 375 | -5.7 | ||||
| ELA · started 3rd in 2017 | G3 379 | — | ||||||
| ELA · started 4th in 2019 | G4 387 | — | ||||||
| ELA · started 3rd in 2019 | G3 385 | — | ||||||
| ELA · started 4th in 2022 | G4 375 | — | ||||||
| ELA · started 3rd in 2023 | G3 376 | — | ||||||
| Math · started 5th in 2015 | G5 389 | — | ||||||
| Math · started 4th in 2015 | G4 380 | G5 391 | +10.3 | |||||
| Math · started 3rd in 2015 | G3 390 | G4 383 | G5 388 | -0.9 | ||||
| Math · started 3rd in 2016 | G3 390 | G4 382 | G5 379 | -5.6 | ||||
| Math · started 3rd in 2017 | G3 387 | G5 385 | -1.4 | |||||
| Math · started 5th in 2022 | G5 380 | — | ||||||
| Math · started 5th in 2023 | G5 378 | — | ||||||
| Math · started 3rd in 2023 | G3 385 | — |
How this works: we follow each grade-cohort across years through the school (3rd graders in 2023 are 4th graders in 2024, etc.) and fit a linear slope on a 100–400 proficiency-points scale built from the state assessment's four levels (L1=1, L2=2, L3=3, L4=4, weighted by student share). This is the same construction Stanford SEDA uses (edopportunity.org/methods); it's not student-level tracking — we measure the school's cohort, not individuals. See the methodology page for thresholds.
Student Growth (Washington)
Student growth percentile: the typical student here grew faster than 66% of Washington students with similar score histories.
Median Student Growth Percentile (SGP), as published by Washington's Office of Superintendent of Public Instruction. 50 is exactly typical for the state. Based on 6 years of data.
| Year | Math SGP | ELA SGP | Students (math / ELA) |
|---|---|---|---|
| 2015 | 65 | 71 | 306 / 300 |
| 2016 | 59 | 52 | 317 / 312 |
| 2017 | 52 | 59 | 326 / 325 |
| 2018 | 50 | 63 | 259 / 262 |
| 2019 | 53 | 59 | 262 / 261 |
| 2023 | 64 | 67 | 232 / 234 |
Washington did not administer statewide tests during 2020–2022, so those years are absent — a gap in the data, not a score of zero.
How this works: a Student Growth Percentile compares a student's score change to other Washington students who started at a similar place, so it measures growth independent of where a student began. We show Washington's published medians; Oregon does not publish student growth percentiles, so this panel never appears on Oregon schools. See the methodology page for how growth enters the Decoded Rank.
Evidence & technical detailClick to expand
School Alpha
School Alpha is the residual between actual and expected performance once school context is held constant. It is a context-adjusted estimate, not a causal claim about teaching quality. Its reliability shows up on the page as the confidence label and the rank interval, not as a standalone statistic.
SES index components
- SES method
- Blended SES index (ACS + FRL)
- SES index value
- 88.0
- FRL %
- 7.2%
- ELL %
- 0.6% · WA OSPI Report Card Enrollment
- SPED %
- 10.7% · WA OSPI Report Card Enrollment
- Tract median income (ACS 5-year)
- $130,855
- Tract poverty rate
- 4.9%
- Tract % bachelor's+
- 70.1%
What "Decoded Rank" means
Decoded Rank converts School Alpha — the context-adjusted residual — into a parent-facing rank within the metro pool. A higher Decoded Rank than Achievement Rank means the school's raw scores understate its performance once neighborhood and school context are held constant. The reverse means raw scores overstate it. The rank is one signal, not a verdict.