2023 Durham Elementary School - SchoolDecoder Scorecard

Decoded Rank

All factors combined

Middle 40% decoded

#208 of 423

plausibly #185–275

Portland-Vancouver-Hillsboro, OR-WA schools

Performing as Expected

#364 in OR

Achievement Rank

Raw test performance

Middle 40% achievement

#138 of 423

Portland-Vancouver-Hillsboro, OR-WA schools

#165 in OR

places from achievement to Decoded Rank

Typical Profile

Raw scores are modest, but students tend to gain ground relative to peers while enrolled.

Data confidence:High559 students tested 6 years98% 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.

Raw test scores rank this school #138, but families here have higher-than-average income and educational attainment, so the expected score is also high. After accounting for context, this school performs about as predicted — the Decoded Rank is #208.

Each component below is scored on a 0–100 within-metro scale. A qualitative band summarizes where the school lands.

Below averagePerforms above what its context predictsCounts for 35% of the rank
After accounting for income and demographics, does this school beat what the data would predict?
StrongStudents gain ground year over yearCounts for 30% of the rank
Are kids at this school learning faster than typical for the metro?
LowEquity within the schoolCounts for 15% of the rank
Are students clustered at similar levels, or split between top and bottom?
Thin dataDirection over recent yearsCounts for 10% of the rank
Is this school's Decoded Rank trending up or down across the years we have data for?
StrongMost students were testedCounts for 10% of the rank
Was the rank computed against a representative share of the school's students?

Show the numbersFor the methodology-curious

Each component is converted to a 0–100 within-metro percentile (100 = top of the metro). "Contribution" is the percentile-points the component adds to (or subtracts from) the metro median before the schools are re-ranked into the composite.

Per-component contributions to this school's Decoded Rank composite. Weight is the share each component carries; percentile is the school's within-metro score on that component.
Component	Weight	Percentile	Contribution
Performs above what its context predicts	35%	33	-6.0
Students gain ground year over year	30%	91	+12.4
Equity within the school	15%	6	-6.6
Direction over recent years · thin data	10%	50	+0.0
Most students were tested	10%	98	+4.8

How the Decoded Rank composite is computed

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 →

All Rankings

How this school ranks across the metro, state, and among demographic peers.

Scope	Achievement	Decoded
Portland-Vancouver-Hillsboro, OR-WA (423 schools)	#138	#208
OR (669 schools)	#165	#364
Among similar schools (6 peers)	#3	#3

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: 565
Free/reduced-price lunch: 42.7%
Student-teacher ratio: 18.2:1
Locale: City, small
School type: Regular public school
Enrollment model: Neighborhood attendance area
Neighborhood median income: $158,942ACS tract proxy
Neighborhood poverty: 0.1%ACS tract proxy
SES index: 84.5
Assessment data year: 2023
CCD year: 2022
ACS vintage: 2020-2024

Within Tigard-Tualatin SD 23J: #2 of 14.Top quintile in district. View district

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.

Wide spread

Students at this school are broadly spread across proficiency levels.

L1 30%

L2 21%

L3 25%

L4 23%

Level 1 — Below standard30%
Level 2 — Approaching standard21%
Level 3 — Meets standard (proficient)25%
Level 4 — Exceeds standard23%

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.

School	Achievement	Decoded	Story	Confidence
Creekside Community High School	Rankings coming soon.
Tigard High School	Rankings coming soon.
James Templeton Elementary School	#251	#416	Typical Profile	High
Twality Middle School	#175	#336	Typical Profile	Medium
Tigard-Tualatin Virtual Academy	Rankings coming soon.

Similar Schools

Schools with comparable demographics, income, and size. Both rank columns shown for direct comparison.

School	Achievement	Decoded	Story	Confidence
Pacific Ridge Elementary School	#1	#1	★Strong by Both Measures	High
James Templeton Elementary School	#251	#416	Typical Profile	High
Metzger Elementary School	#190	#329	Typical Profile	High
Linus Pauling Middle School	#9	#6	Typical Profile	Medium
Charles F Tigard Elementary School	#153	#343	Typical Profile	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	#138	#208

Note: assessment transitions (where a state changes its test) are footnoted on the methodology page; trends are not computed across breakpoints.

Trajectory

Not enough years yet

Trajectory will appear with 2025-26 data 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 2018 gained 28 proficiency points by 4th grade — gaining, versus a metro median of about 0/yr.

Based on 10 cohorts across math + ELA.

Learning rate: +9.0 proficiency points/yr (95% CI 3.2 to 14.8)

Medium confidence

Cohort	2015	2016	2017	2018	2019	2023	Slope
ELA · started 5th in 2015	G5 280						—
ELA · started 4th in 2015	G4 276	G5 291					+14.8
ELA · started 3rd in 2015	G3 272	G4 279	G5 278				+3.2
ELA · started 3rd in 2016		G3 285	G4 310	G5 311			+13.0
ELA · started 3rd in 2017			G3 261	G4 278	G5 288		+13.8
ELA · started 3rd in 2018				G3 248	G4 277		+28.4
ELA · started 3rd in 2019					G3 282		—
ELA · started 5th in 2023						G5 258	—
ELA · started 4th in 2023						G4 224	—
ELA · started 3rd in 2023						G3 261	—
Math · started 5th in 2015	G5 257						—
Math · started 4th in 2015	G4 279	G5 274					-4.5
Math · started 3rd in 2015	G3 256	G4 256	G5 253				-1.2
Math · started 3rd in 2016		G3 274	G4 294	G5 286			+5.9
Math · started 3rd in 2017			G3 258	G4 273	G5 269		+5.5
Math · started 3rd in 2018				G3 265	G4 286		+20.7
Math · started 3rd in 2019					G3 296		—
Math · started 5th in 2023						G5 226	—
Math · started 4th in 2023						G4 225	—
Math · started 3rd in 2023						G3 254	—

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.

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.

Shrunk Alpha (95% CI): -0.31 (95% CI: -0.35 to -0.26)

SES index components

SES method: Blended SES index (ACS + FRL)
SES index value: 84.5
FRL %: 42.7%
ELL %: 22.0% · OR ODE At-A-Glance (Ever English Learners)
SPED %: 13.0% · OR ODE At-A-Glance
Tract median income (ACS 5-year): $158,942
Tract poverty rate: 0.1%
Tract % bachelor's+: 55.0%

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.

Read the full methodology → · Data sources →