Enrollment
114
Illinois · 2024-25 NCES data
High school (grades 9-12) · Armstrong, IL
Armstrong High School
Federal NCES profile for Armstrong High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 36/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 170423000119
👥 S:T ratio 70
📚 AP courses 5
🌟 Gifted program 30
🎓 Counselors 77
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Armstrong High School earns 36/100 on the Resource Investment Index, with class sizes smaller than 98% of Illinois schools.
- 36
- Resource Index · Typical
- 7.6:1
- small classes for Illinois
- 114
- students enrolled
Armstrong High School has class sizes smaller than 98% of Illinois schools. Computed live against every Illinois school reporting to NCES.
School address
District: Armstrong Twp Hsd 225 · Illinois
NCES ID 170423000119 Verify on NCES CCD record →
Teachers (FTE)
15.0
Federal CCD staff survey
Students per teacher
7.6:1
vs 14:1 Illinois avg
-46% vs state
Student-teacher ratio in context
How Armstrong High School compares with Illinois and U.S. medians
What stands out at Armstrong High School
Armstrong High School is a small high school in Armstrong, Illinois, enrolling 114 students.
Classes run notably small here: at 7.6:1, Armstrong High School is leaner than roughly 98% of Illinois schools and 46% under the state's 14:1 norm, more adult attention per pupil than most peers.
This is a small campus: fewer students than 93% of Illinois schools, with 114 enrolled.
Its Resource Investment Index sits near the middle of the pack among 3,845 scored Illinois schools.
Its student body is predominantly White (91% of enrollment) (diversity index 16/100).
On the academic-pipeline side it reports 1 Advanced Placement course.
Counselor coverage is strong, about 114 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 56.1% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The federal civil-rights collection also records 1 expulsion at this campus for 2021-22.
Armstrong Twp Hsd 225 operates only this one school, so Armstrong High School has no district-mates to compare against locally. At 114 students, it is also a small operation, on the smaller end of Illinois's single-school districts.
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 Armstrong High School compares
Armstrong High School on the metrics families compare, against Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 7.6:1 | ▼ 46% | 14:1 | 15.7:1 |
| Enrollment | 114 | top 93% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
7.6:1
Leaner classes than 96% of US schools, among the more generously staffed nationally.
114
Bigger than 11% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Staffing depth
7.6:1
students per teacher
- 46% below state mean
Top 2% in Illinois - lower ratio than 98% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
56.1%
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
$18,346
per pupil, district-wide
- above Illinois avg of $17,042
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors1.0 FTE
Per 114 students, the combined health-and-guidance staffing load for this school.
Discipline context
1
in-school suspensions + 7 out-of-school
Suspension rate: 0.9 per 100 students. Combined in-school and out-of-school rate: 7.0 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
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 91.2%
Hispanic or Latino 5.3%
Two or More 3.5%
Largest group: White at 91.2% of enrollment.
Student-body diversity index 16.4/100
Simpson diversity index - at 16.4, Armstrong High School is less mixed than the Illinois school average of 38.9.
Programs
AP courses offered 1
Funding & spending
District-wide per-pupil expenditure for Armstrong Twp Hsd 225, which includes Armstrong High School.
$18,346
Per student
+8%
vs Illinois
Avg $17,042
+11%
vs U.S.
Avg $16,593
Revenue mix
Local 80.5%
State 16.5%
Federal 3.0%
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.
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Illinois, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~114 students)
Next steps
Verify locally before acting on Armstrong High School's federal record.
- Compare Armstrong High School against another school. Compare schools
- Armstrong Twp Hsd 225'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 Armstrong High School
How many students attend Armstrong High School?
Armstrong High School has 114 students enrolled. It is a high school in Armstrong, IL.
What is the student-teacher ratio at Armstrong High School?
The student-teacher ratio at Armstrong High School is 7.6:1, which is 46% lower than the Illinois average of 14:1 and 52% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of Armstrong High School?
The largest demographic group at Armstrong High School is White at 91.2% of enrollment, in Armstrong, IL.
What is the Resource Investment Index for Armstrong High School?
Armstrong High School has a Resource Investment Index of 36/100 (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).
Is Armstrong High School a good school?
Armstrong High School earns 36/100 on the Resource Investment Index, with class sizes smaller than 98% of Illinois 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 Armstrong Twp Hsd 225?
None reported; Armstrong Twp Hsd 225 operates only Armstrong High School as a public school district in NCES's records.
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.