Enrollment
1,840
Minnesota · 2024-25 NCES data
High school (grades 9-12) · Plymouth, MN
Robbinsdale Armstrong Senior High
Federal NCES profile for Robbinsdale Armstrong Senior High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 41/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 273178001318
👥 S:T ratio 0
📚 AP courses 75
🌟 Gifted program 70
🎓 Counselors 26
📋 Attendance 32
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Robbinsdale Armstrong Senior High earns 41/100 on the Resource Investment Index, with class sizes larger than 95% of Minnesota schools. It is also one of the largest schools in Minnesota.
- #4 of 5
- high schools in Plymouth · Resource Index
- 41
- Resource Index · Typical
- 30.7:1
- large classes for Minnesota
- 38.3%
- free-lunch eligible
Robbinsdale Armstrong Senior High has class sizes larger than 95% of Minnesota schools. Computed live against every Minnesota school reporting to NCES.
By Resource Investment Index, Robbinsdale Armstrong Senior High ranks #4 of 5 high schools in Plymouth, MN.
School address
District: Robbinsdale Public School District · Minnesota
NCES ID 273178001318 Verify on NCES CCD record →
Teachers (FTE)
60.0
Federal CCD staff survey
Students per teacher
30.7:1
vs 15.8:1 Minnesota avg
+94% vs state
Free-lunch eligible
38.3%
vs 42.8% Minnesota avg
-11% vs state
Student-teacher ratio in context
How Robbinsdale Armstrong Senior High compares with Minnesota and U.S. medians
What stands out at Robbinsdale Armstrong Senior High
Robbinsdale Armstrong Senior High is a large high school in Plymouth, Minnesota, enrolling 1,840 students.
Class loads run heavy: 30.7:1 is larger than about 95% of Minnesota schools and 94% above the 15.8:1 state mean, so each teacher carries more students than is typical.
Its free-meal eligibility rate of 38.3% lands close to the Minnesota typical range, neither a high- nor low-need campus by this measure.
By headcount it is one of the larger campuses in Minnesota, bigger than 98% of state schools at 1,840 students.
Its Resource Investment Index lands in the lower third of 2,334 scored Minnesota schools.
Against 48 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #20.
Its student body is led by White (45%) and African American (25%), more mixed than most schools in the state (diversity index 71/100).
On the academic-pipeline side it reports 15 Advanced Placement courses.
Counselor availability sits well past the ASCA benchmark, roughly 368 students sharing each counselor, though short of the most stretched campuses.
Chronic absenteeism is elevated: 27.4% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Robbinsdale Public School District also operates Robbinsdale Cooper Senior High (1,396 students) and Plymouth Middle (749 students) alongside Robbinsdale Armstrong Senior High.
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 Robbinsdale Armstrong Senior High compares
Robbinsdale Armstrong Senior High on the metrics families compare, against Minnesota and U.S. means.
| Metric | This school | vs Minnesota | Minnesota avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 30.7:1 | ▲ 94% | 15.8:1 | 15.7:1 |
| Free-lunch eligible | 38.3% | ▼ 11% | 42.8% | 51.7% |
| Enrollment | 1,840 | top 2% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
30.7:1
Leaner classes than 2% of US schools, heavier class loads than most.
1,840
Bigger than 98% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
38.3%
free-lunch eligible
- 11% below the Minnesota average of 42.8%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
30.7:1
students per teacher
- 94% above state mean
Top 95% in Minnesota - lower ratio than 5% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
27.4%
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
$16,508
per pupil, district-wide
- above Minnesota avg of $15,270
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors5.0 FTE
Per 368 students, the combined health-and-guidance staffing load for this school.
Discipline context
4
in-school suspensions + 107 out-of-school
Suspension rate: 0.2 per 100 students. Combined in-school and out-of-school rate: 6.0 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 44.6%
African American 25.2%
Hispanic or Latino 14.7%
Two or More 9.0%
Asian 5.7%
American Indian / Alaska Native 0.8%
Native Hawaiian / Pacific Islander 0.1%
Largest group: White at 44.6% of enrollment.
Student-body diversity index 70.5/100
Simpson diversity index - at 70.5, Robbinsdale Armstrong Senior High is more mixed than the Minnesota school average of 42.8.
Programs
AP courses offered 15
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Robbinsdale Public School District, which includes Robbinsdale Armstrong Senior High.
$16,508
Per student
+8%
vs Minnesota
Avg $15,270
-1%
vs U.S.
Avg $16,593
Revenue mix
Local 33.0%
State 55.0%
Federal 12.0%
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 Robbinsdale Armstrong Senior High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Robbinsdale Cooper Senior High | Similar size | Higher economic need | Lower S:T ratio |
| Plymouth Middle | Smaller | Similar economic need | Lower S:T ratio |
| Robbinsdale Spanish Immersion El. | Smaller | Lower economic need | Lower S:T ratio |
| Robbinsdale Middle | Smaller | Higher economic need | Lower S:T ratio |
| Meadow Lake Elementary | Smaller | Higher economic need | Lower S:T ratio |
Comparisons are relative to Robbinsdale Armstrong Senior High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,396
- Students per teacher
- 24.1:1
- Resource Index
- 23/100
- Enrollment
- 749
- Students per teacher
- 26.8:1
- Resource Index
- 35/100
- Enrollment
- 733
- Students per teacher
- 20.9:1
- Resource Index
- 55/100
- Enrollment
- 567
- Students per teacher
- 18.3:1
- Resource Index
- 40/100
- Enrollment
- 488
- Students per teacher
- 13.9:1
- Resource Index
- 51/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Minnesota, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~1,840 students)
Similar student-teacher ratio (~30.7:1)
Next steps
Verify locally before acting on Robbinsdale Armstrong Senior High's federal record.
- Compare Robbinsdale Armstrong Senior High against another school. Compare schools
- Robbinsdale Public School District'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 Robbinsdale Armstrong Senior High
How many students attend Robbinsdale Armstrong Senior High?
Robbinsdale Armstrong Senior High has 1,840 students enrolled. It is a high school in Plymouth, MN.
What is the student-teacher ratio at Robbinsdale Armstrong Senior High?
The student-teacher ratio at Robbinsdale Armstrong Senior High is 30.7:1, which is 94% higher than the Minnesota average of 15.8:1 and 96% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Robbinsdale Armstrong Senior High?
38.3% of students at Robbinsdale Armstrong Senior High are eligible for free lunch, compared to the Minnesota average of 42.8%.
What is the racial and ethnic makeup of Robbinsdale Armstrong Senior High?
The largest demographic group at Robbinsdale Armstrong Senior High is White at 44.6% of enrollment, in Plymouth, MN. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 70.5/100.
What is the Resource Investment Index for Robbinsdale Armstrong Senior High?
Robbinsdale Armstrong Senior High has a Resource Investment Index of 41/100 (typical reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Robbinsdale Armstrong Senior High rank among high schools in Plymouth?
By Resource Investment Index, Robbinsdale Armstrong Senior High ranks #4 of 5 high schools in Plymouth, MN. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Plymouth on the city page.
Is Robbinsdale Armstrong Senior High a good school?
Robbinsdale Armstrong Senior High earns 41/100 on the Resource Investment Index, with class sizes larger than 95% of Minnesota schools. It is also one of the largest schools in Minnesota. 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 Robbinsdale Public School District?
Besides Robbinsdale Armstrong Senior High, Robbinsdale Public School District also operates Robbinsdale Cooper Senior High (1,396 students), Plymouth Middle (749 students), and Robbinsdale Spanish Immersion El. (733 students). See the Robbinsdale Public School District 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.