- Enrollment
- 1,650
- Students per teacher
- 20.9:1
- Resource Index
- 44/100
Middle school (grades 6-8) · Arlington, WA
Post Middle School
Federal NCES profile for Post Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 40/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 530024000024
👥 S:T ratio 19
🌟 Gifted program 70
🎓 Counselors 36
📋 Attendance 35
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Post Middle School earns 40/100 on the Resource Investment Index, with class sizes larger than 80% of Washington schools.
- #3 of 12
- public schools in Arlington · Resource Index
- 40
- Resource Index · Typical
- 20.2:1
- large classes for Washington
- 33.6%
- free-lunch eligible
Post Middle School has class sizes larger than 80% of Washington schools. Computed live against every Washington school reporting to NCES.
By Resource Investment Index, Post Middle School ranks #3 of 12 public schools in Arlington, WA.
School address
District: Arlington School District · Washington
NCES ID 530024000024 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-9 students YoY
Post Middle School held near 634 students from 2022-23 to 2023-24 (-9 headcount).
Teacher FTE lost 32.1 → 29.4 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-9 students YoY 530024000024 · Arlington, WA Middle · MID · TRAD
645 enr · 20.2:1 · 33.6% lunch · RII 40
Nearest enrollment peer: Arlington High School (1,650 students)
Post Middle School held near 634 students from 2022-23 to 2023-24 (-9 headcount). Teacher FTE lost 32.1 → 29.4 across the same CCD years. Read with this school → · District book → · Washington schools → · Find another →
Post Middle School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Arlington High
Arlington High School
1,650 students
- Eagle Creek El
Eagle Creek Elementary
665 students
- This school 645
Post Middle School
645 students
- Kent Prairie E 621
Kent Prairie Elementary
621 students
- Presidents Ele 578
Presidents Elementary
578 students
- Haller Middle 576
Haller Middle School
576 students
What this shows Post Middle School reports 645 students on the CCD universe file.
How Post Middle School compares
Post Middle School held steady on CCD headcount: ratios and free-lunch share vs Washington and U.S. means.
| Metric | This school | vs Washington | Washington avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 20.2:1 | ▲ 15% | 17.6:1 | 15.7:1 |
| Free-lunch eligible | 33.6% | ▼ 25% | 45.0% | 51.7% |
| Enrollment | 645 | top 17% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
20.2:1
Leaner classes than 15% of US schools, heavier class loads than most.
645
Bigger than 76% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
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
20.2:1
students per teacher
- 15% above state mean
Top 80% in Washington - lower ratio than 20% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
25.9%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$17,022
per pupil, district-wide
- below Washington avg of $20,912
Close to the U.S. public-school average per-pupil spend.
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.
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.
Student-body diversity index 44.5/100
Simpson diversity index - at 44.5, Post Middle School is less mixed than the Washington school average of 53.3.
Programs
Gifted & talented Yes
District finance for Arlington School District reports $17,022 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Post Middle School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Arlington High School | Larger | Similar economic need | Similar S:T ratio |
| Eagle Creek Elementary | Similar size | Similar economic need | Lower S:T ratio |
| Kent Prairie Elementary | Similar size | Similar economic need | Lower S:T ratio |
| Presidents Elementary | Similar size | Similar economic need | Lower S:T ratio |
| Haller Middle School | Similar size | Similar economic need | Similar S:T ratio |
Comparisons are relative to Post Middle School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 665
- Students per teacher
- 15.8:1
- Resource Index
- 33/100
- Enrollment
- 621
- Students per teacher
- 15.5:1
- Resource Index
- 32/100
- Enrollment
- 578
- Students per teacher
- 16.1:1
- Resource Index
- 33/100
- Enrollment
- 576
- Students per teacher
- 21.3:1
- Resource Index
- 40/100
Similar middle schools in Arlington
1 comparable middle schools (grades 6-8) serving the same city.
Nationwide middle schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~645 students)
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. CCD year-over-year: 643 (2022-23) → 634 (2023-24), nearly flat (-9).
What is the student-teacher ratio at Post Middle School?
The student-teacher ratio at Post Middle School is 20.2:1, which is 15% higher than the Washington average of 17.6:1 and 29% higher than the national average of 15.7:1.
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% of enrollment, in Arlington, WA.
What is the Resource Investment Index for Post Middle School?
Post Middle School has a Resource Investment Index of 40/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Post Middle School rank among public schools in Arlington?
By Resource Investment Index, Post Middle School ranks #3 of 12 public schools in Arlington, WA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Arlington on the city page.
What other schools are in Arlington School District?
Besides Post Middle School, Arlington School District also operates Arlington High School (1,650 students), Eagle Creek Elementary (665 students), and Kent Prairie Elementary (621 students). See the Arlington School District district page for the complete list.