Enrollment
645
Washington · 2024-25 NCES data
2024-25 NCES data Middle school (grades 6-8) NCES 530024000024
Post Middle School — Arlington, WA
Federal NCES profile for Post Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators — Resource Investment Index 40/100.
👥 Class size 20
🌟 Gifted program 70
🎓 Counselors 36
📋 Attendance 35
How this works: Each indicator above is scored 0–100 from federal NCES and CRDC data, then averaged into the Resource Investment Index. This measures resource allocation — staffing, programs, and support services — not standardized test scores or academic outcomes. Full methodology →
School address
District: Arlington School District · Washington
Public location data per NCES (National Center for Education Statistics) Common Core of Data. Verify the school's current address on the NCES CCD record.
Teachers (FTE)
32.0
Federal CCD staff survey
Students per teacher
20.1:1
vs 17.8:1 Washington avg
+13% vs state
Free-lunch eligible
33.6%
vs 45.0% Washington avg
-25% vs state
Student-teacher ratio in context
How Post Middle School compares with Washington and U.S. medians
The federal record — no proprietary index, no editorial formula.
PlainSchools publishes the actual federal measurements — enrollment, staffing, demographics, discipline, and finance — straight from the NCES Common Core of Data, CRDC, and F-33 surveys. No composite rating, no opinion-based score on top. You get the same raw numbers researchers and policymakers use, with benchmarks, spending context, and equity indicators computed from the same federal datasets. Full methodology linked below.
What this school's NCES data tells you
Post Middle School reports 645 enrolled students to the National Center for Education Statistics (NCES) alongside 32.0 full-time-equivalent teachers, producing a 20.1:1 student-teacher ratio. That figure sits 13% above the Washington state mean of 17.8:1, signalling larger average class loads than peers in the same state. Against the national 2024-25 average of 15.9:1, it is 26% higher, a useful calibration for families comparing districts across state lines.
Title I and federal lunch eligibility offer another window into the student body: 33.6% of pupils qualify for free meals, a proxy for household income that federal programs use to direct funding. The free-lunch share is 25% below the Washington average and 35% below the national baseline. Counselor coverage works out to roughly 323 students per counselor, above the ASCA-recommended ceiling of 250:1. Chronic absenteeism — missing 10% or more of school days — stands at 25.9% according to the 2021-22 Civil Rights Data Collection.
On the finance side, the surrounding Arlington School District spends $19,306 per pupil district-wide, below the Washington average of $23,175 and below the national average of $19,490. Revenue comes 18.2% from local sources (property taxes), 68.7% from the state, and 13.1% from federal programs per the NCES F-33 finance survey. Taken together, these measurements produce a Resource Investment Index of 40/100 (D), calculated from 4 distinct NCES and CRDC indicators measuring resource allocation rather than academic outcomes.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Post Middle School compares
Cross-validating school-level NCES values against Washington state and U.S. national means lets readers see whether this school is an outlier or in line with peers.
| Metric | This school | vs Washington | Washington avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 20.1:1 | ▲ 13% | 17.8:1 | 15.9:1 |
| Free-lunch eligible | 33.6% | ▼ 25% | 45.0% | 51.8% |
| Enrollment | 645 | top 83% | — | — |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
What the federal data reveals about equity at this school
Federal measurements — not ratings — surface the resource and opportunity picture. Below are the indicators that researchers, civil-rights monitors, and funding formulas use to assess equity.
Economic need
33.6%
free-lunch eligible
— 25% below the Washington average of 45.0%
Below the 40% Title I threshold — federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
20.1:1
students per teacher
— 13% above state mean
Top 81% in Washington — lower ratio than 19% of state schools
Above 20:1 — larger class loads than the typical U.S. public school; staffing is stretched relative to enrollment.
Engagement
25.9%
chronically absent (missed 10%+ of school days)
Chronic absenteeism at or above 20% — the CDC threshold for "high" — signals significant barriers to regular attendance.
Funding equity
$19,306
per pupil, district-wide
— below Washington avg of $23,175
Below the U.S. average per-pupil spend — funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors2.0 FTE
Per 323 students — the combined health-and-guidance staffing load for this school.
Discipline context
24
in-school suspensions + 55 out-of-school
Suspension rate: 3.7 per 100 students. Combined in-school and out-of-school rate: 12.2 per 100 students. Reported via the Civil Rights Data Collection. Includes 54 expulsions.
Overview
Enrollment 645 Top 83% in Washington — larger than 17% of 2,465 state schools
Teachers (FTE) 32.0
Students per teacher 20.1:1 +13% vs state
Free-lunch eligible 33.6% -25% vs state
NCES ID 530024000024
Student demographics
White 72.4%
Hispanic or Latino 15.8%
Two or More 7.1%
Asian 1.7%
American Indian / Alaska Native 1.6%
African American 1.1%
Native Hawaiian / Pacific Islander 0.3%
Largest group: White at 72.4% of enrollment.
Programs & staff
Gifted & talented Yes
Counselors (FTE) 2.0
Students per counselor 323:1
Discipline & special education
Chronically absent 25.9%
In-school suspensions 24
Out-of-school suspensions 55
Expulsions 54
Funding & spending
District-wide per-pupil expenditure for Arlington School District, which includes Post Middle School.
$19,306
Per student
-17%
vs Washington
Avg $23,175
-1%
vs U.S.
Avg $19,490
Revenue mix
Local 18.2%
State 68.7%
Federal 13.1%
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.
Other Schools in This District
- Enrollment
- 1,650
- Students per teacher
- 21:1
- Enrollment
- 665
- Students per teacher
- 15.7:1
- Enrollment
- 621
- Students per teacher
- 14.8:1
- Enrollment
- 578
- Students per teacher
- 15.3:1
- Enrollment
- 576
- Students per teacher
- 21.8:1
Similar middle schools in Arlington
1 comparable middle schools (grades 6-8) serving the same city.
Educator & family resources
In-depth guides on understanding NCES data, school choice, and education funding.
Understanding NCES data
How CCD, CRDC and EDFacts feed every public-school number you see.
Choose a school district
Eight signals that matter more than the overall ranking number.
How schools are funded
Title I, F-33, state aid formulas and what per-pupil spending really means.
Chronic absenteeism
Why missing 10% of school matters and how it varies by district.
Magnet vs charter vs traditional
Three school types, three funding models, three sets of trade-offs.
School discipline data
What CRDC suspension and expulsion records do and don't reveal.
Frequently asked questions about Post Middle School
How many students attend Post Middle School?
Post Middle School has 645 students enrolled. It is a middle school in Arlington, WA.
What is the student-teacher ratio at Post Middle School?
The student-teacher ratio at Post Middle School is 20.1:1, which is 13% higher than the Washington average of 17.8:1 and 26% higher than the national average of 15.9:1.
What percentage of students receive free lunch at Post Middle School?
33.6% of students at Post Middle School are eligible for free lunch, compared to the Washington average of 45.0%.
What is the racial and ethnic makeup of Post Middle School?
The largest demographic group at Post Middle School is White at 72.4%. The school serves a diverse student body in Arlington, WA.
What is the Resource Investment Index for Post Middle School?
Post Middle School has a Resource Investment Index of 40/100 (D) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. This index measures federal resource allocation — staffing levels, program availability, and support services — not standardized test scores or academic outcomes.