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 44/100.
The verdict
Armstrong High School earns 44/100 on the Resource Investment Index, with class sizes smaller than 98% of Illinois schools.
- 44
- 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
NCES ID 170423000119 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-21 students YoY
Armstrong High School shrank from 135 students in 2022-23 to 114 in 2023-24 (-15.6%).
Teacher FTE lost 15.0 → 14.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-21 students YoY 170423000119 · Armstrong, IL High · SMALL · TRAD
114 enr · 7.6:1 · RII 44
Nearest enrollment peer: Boulder Prep Charter High School (114 students)
Armstrong High School shrank from 135 students in 2022-23 to 114 in 2023-24 (-15.6%). Teacher FTE lost 15.0 → 14.0 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
How Armstrong High School compares
Armstrong High School is a shrinking campus on CCD: ratios and free-lunch share vs 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
Equity indicators methodology
Student demographics
Largest group: White at 91.2% of enrollment.
Simpson diversity index - at 16.4, Armstrong High School is less mixed than the Illinois school average of 38.9.
Programs
District finance for Armstrong Twp Hsd 225 reports $20,956 per pupil (NCES F-33) - open the district page for the full revenue mix.
Nationwide high 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 (~114 students)
Similar student-teacher ratio (~7.6:1)
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. CCD year-over-year: 135 (2022-23) → 114 (2023-24), down 21.
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 44/100 (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).
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.