Enrollment
165
Oregon · 2024-25 NCES data
Elementary school (grades K-5) · Portland, OR
Portland Arthur Academy Charter School
Federal NCES profile for Portland Arthur Academy Charter School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 62/100.
2024-25 NCES dataElementary school (grades K-5)NCES 411004001667Charter school
👥 S:T ratio 34
🌟 Gifted program 70
📋 Attendance 83
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Portland Arthur Academy Charter School earns 62/100 on the Resource Investment Index, with class sizes near the Oregon median. It is also more racially and ethnically mixed than most Oregon schools.
- #1 of 87
- elementary schools in Portland · Resource Index
- 62
- Resource Index · Higher
- 16.5:1
- students per teacher
- 28.0%
- free-lunch eligible
Portland Arthur Academy Charter School has class sizes near the Oregon median. Computed live against every Oregon school reporting to NCES.
By Resource Investment Index, Portland Arthur Academy Charter School ranks #1 of 87 elementary schools in Portland, OR.
School address
District: Portland Sd 1j · Oregon
NCES ID 411004001667 Verify on NCES CCD record →
Teachers (FTE)
10.0
Federal CCD staff survey
Students per teacher
16.5:1
vs 17.6:1 Oregon avg
-6% vs state
Free-lunch eligible
28.0%
vs 52.8% Oregon avg
-47% vs state
Student-teacher ratio in context
How Portland Arthur Academy Charter School compares with Oregon and U.S. medians
What stands out at Portland Arthur Academy Charter School
Portland Arthur Academy Charter School is a mid-sized charter elementary school in Portland, Oregon, enrolling 165 students.
At 16.5:1, its student-teacher ratio sits close to the Oregon median, within a few percentage points of the 17.6:1 state norm, neither notably crowded nor notably small.
Economic need runs somewhat below the state's typical profile, with 28.0% of students eligible for free meals.
Enrollment of 165 puts it in the smaller third of Oregon schools by headcount.
Its Resource Investment Index outscores 98% of the 1,273 Oregon schools with a score on record, a top-tier result on this measure.
Among 72 similarly sized, similarly resourced-need Oregon schools statewide, it ranks #2, a top-tier result once campus size and economic need are matched.
Its student body is led by White (44%) and Asian (26%), more mixed than most schools in the state (diversity index 71/100).
Attendance holds up well here: only 6.7% of students were chronically absent, below the typical post-pandemic national figure.
Among Portland's elementary schools, it stands alongside Sato Elementary School (863 students): Portland Arthur Academy Charter School is smaller than that campus by headcount and runs leaner classes (16.5:1 vs 22.1:1).
Portland Sd 1j also operates Grant High School (2,149 students) and Franklin High School (1,807 students) alongside Portland Arthur Academy Charter School.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Portland Arthur Academy Charter School compares
Portland Arthur Academy Charter School on the metrics families compare, against Oregon and U.S. means.
| Metric | This school | vs Oregon | Oregon avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 16.5:1 | ▼ 6% | 17.6:1 | 15.7:1 |
| Free-lunch eligible | 28.0% | ▼ 47% | 52.8% | 51.7% |
| Enrollment | 165 | top 82% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.5:1
Leaner classes than 34% of US schools, a middle-of-the-pack class size.
165
Bigger than 16% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
28.0%
free-lunch eligible
- 47% below the Oregon average of 52.8%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
16.5:1
students per teacher
- 6% below state mean
Top 43% in Oregon - lower ratio than 57% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
6.7%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
Funding equity
$18,429
per pupil, district-wide
- above Oregon avg of $18,086
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 3 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 1.8 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 43.6%
Asian 26.1%
African American 12.1%
Hispanic or Latino 10.3%
Two or More 7.3%
American Indian / Alaska Native 0.6%
Largest group: White at 43.6% of enrollment.
Student-body diversity index 71.1/100
Simpson diversity index - at 71.1, Portland Arthur Academy Charter School is more mixed than the Oregon school average of 47.1.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Portland Sd 1j, which includes Portland Arthur Academy Charter School.
$18,429
Per student
+2%
vs Oregon
Avg $18,086
+11%
vs U.S.
Avg $16,593
Revenue mix
Local 57.4%
State 33.4%
Federal 9.2%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Portland Arthur Academy Charter School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Grant High School | Larger | Lower economic need | Higher S:T ratio |
| Franklin High School | Larger | Similar economic need | Similar S:T ratio |
| Leodis V. Mcdaniel High School | Larger | Higher economic need | Higher S:T ratio |
| Ida B. Wells-Barnett High School | Larger | Lower economic need | Higher S:T ratio |
| Lincoln High School | Larger | Lower economic need | Higher S:T ratio |
Comparisons are relative to Portland Arthur Academy Charter School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,149
- Students per teacher
- 21.3:1
- Resource Index
- 32/100
- Enrollment
- 1,807
- Students per teacher
- 17.2:1
- Resource Index
- 37/100
- Enrollment
- 1,681
- Students per teacher
- 18.5:1
- Resource Index
- 34/100
- Enrollment
- 1,650
- Students per teacher
- 21.7:1
- Resource Index
- 32/100
- Enrollment
- 1,611
- Students per teacher
- 21.5:1
- Resource Index
- 37/100
Similar elementary schools in Portland
6 comparable elementary schools (grades K-5) serving the same city.
Sato Elementary School
Standard public school
863 students 22.1:1 students per teacher
Springville K-8 School
Standard public school
742 students 19:1 students per teacher
Laurelhurst Elementary School
Standard public school
660 students 22:1 students per teacher
Jacob Wismer Elementary School
Standard public school
592 students 20.4:1 students per teacher
Ainsworth Elementary School
Standard public school
587 students 21:1 students per teacher
Findley Elementary
Standard public school
549 students 22:1 students per teacher
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of Oregon, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~165 students)
Next steps
Verify locally before acting on Portland Arthur Academy Charter School's federal record.
- Compare Portland Arthur Academy Charter School against another school. Compare schools
- Portland Sd 1j's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Portland Arthur Academy Charter School
How many students attend Portland Arthur Academy Charter School?
Portland Arthur Academy Charter School has 165 students enrolled. It is an elementary school in Portland, OR.
What is the student-teacher ratio at Portland Arthur Academy Charter School?
The student-teacher ratio at Portland Arthur Academy Charter School is 16.5:1, which is 6% lower than the Oregon average of 17.6:1 and 5% higher than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Portland Arthur Academy Charter School?
28.0% of students at Portland Arthur Academy Charter School are eligible for free lunch, compared to the Oregon average of 52.8%.
What is the racial and ethnic makeup of Portland Arthur Academy Charter School?
The largest demographic group at Portland Arthur Academy Charter School is White at 43.6% of enrollment, in Portland, OR. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 71.1/100.
What is the Resource Investment Index for Portland Arthur Academy Charter School?
Portland Arthur Academy Charter School has a Resource Investment Index of 62/100 (higher reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Portland Arthur Academy Charter School rank among elementary schools in Portland?
By Resource Investment Index, Portland Arthur Academy Charter School ranks #1 of 87 elementary schools in Portland, OR. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Portland on the city page.
Is Portland Arthur Academy Charter School a good school?
Portland Arthur Academy Charter School earns 62/100 on the Resource Investment Index, with class sizes near the Oregon median. It is also more racially and ethnically mixed than most Oregon schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Portland Sd 1j?
Besides Portland Arthur Academy Charter School, Portland Sd 1j also operates Grant High School (2,149 students), Franklin High School (1,807 students), and Leodis V. Mcdaniel High School (1,681 students). See the Portland Sd 1j district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.