- Enrollment
- 925
- Students per teacher
- 17.1:1
- Resource Index
- 32/100
High school (grades 9-12) · Troy, IL
Triad High School
Federal NCES profile for Triad High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 33/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 173735003870
👥 S:T ratio 35
🌟 Gifted program 30
🎓 Counselors 19
📋 Attendance 46
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Triad High School earns 33/100 on the Resource Investment Index, with class sizes larger than 81% of Illinois schools. It is also one of the largest schools in Illinois.
- #3 of 3
- public schools in Troy · Resource Index
- 33
- Resource Index · Typical
- 16.2:1
- large classes for Illinois
- 1,218
- students enrolled
Triad High School has class sizes larger than 81% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Triad High School ranks #3 of 3 public schools in Troy, IL.
School address
CCD year-over-year · 2022-23 → 2023-24
-17 students YoY
Triad High School held near 1,188 students from 2022-23 to 2023-24 (-17 headcount).
Teacher FTE added 75.1 → 75.5 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-17 students YoY 173735003870 · Troy, IL High · MID · TRAD
1,218 enr · 16.2:1 · RII 33
Nearest enrollment peer: Triad Middle School (925 students)
Triad High School held near 1,188 students from 2022-23 to 2023-24 (-17 headcount). Teacher FTE added 75.1 → 75.5 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
Triad High School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- This school
Triad High School
1,218 students
- Triad Middle S
Triad Middle School
925 students
- Silver Creek E
Silver Creek Elementary
757 students
- C a Henning Sc
C a Henning School
706 students
- St Jacob Elem 262
St Jacob Elem School
262 students
- Marine Elem Sc 141
Marine Elem School
141 students
What this shows Triad High School reports 1,218 students on the CCD universe file.
How Triad High School compares
Triad High School held steady on CCD headcount: ratios and free-lunch share vs Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 16.2:1 | ▲ 16% | 14:1 | 15.7:1 |
| Enrollment | 1,218 | top 5% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.2:1
Leaner classes than 36% of US schools, a middle-of-the-pack class size.
1,218
Bigger than 94% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Staffing depth
16.2:1
students per teacher
- 16% above state mean
Top 81% in Illinois - lower ratio than 19% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
21.6%
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
$12,745
per pupil, district-wide
- below Illinois avg of $18,196
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors3.0 FTE
Per 406 students, the combined health-and-guidance staffing load for this school.
Discipline context
87
in-school suspensions + 6 out-of-school
Suspension rate: 7.1 per 100 students. Combined in-school and out-of-school rate: 7.6 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 89.8%
Two or More 3.8%
Hispanic or Latino 3.0%
African American 2.2%
Asian 0.6%
American Indian / Alaska Native 0.3%
Native Hawaiian / Pacific Islander 0.2%
Largest group: White at 89.8% of enrollment.
Student-body diversity index 19.1/100
Simpson diversity index - at 19.1, Triad High School is less mixed than the Illinois school average of 38.9.
Programs
AP courses offered 11
District finance for Triad Cusd 2 reports $12,745 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Triad High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Triad Middle School | Similar size | No free-lunch data | Similar S:T ratio |
| Silver Creek Elementary | Smaller | No free-lunch data | Higher S:T ratio |
| C a Henning School | Smaller | No free-lunch data | Similar S:T ratio |
| St Jacob Elem School | Smaller | No free-lunch data | Higher S:T ratio |
| Marine Elem School | Smaller | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Triad High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 757
- Students per teacher
- 18:1
- Resource Index
- 38/100
- Enrollment
- 706
- Students per teacher
- 15:1
- Resource Index
- 42/100
- Enrollment
- 262
- Students per teacher
- 18.7:1
- Resource Index
- 43/100
- Enrollment
- 141
- Students per teacher
- 15.7:1
- Resource Index
- 46/100
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 (~1,218 students)
Frequently asked questions about Triad High School
How many students attend Triad High School?
Triad High School has 1,218 students enrolled. It is a high school in Troy, IL. CCD year-over-year: 1,205 (2022-23) → 1,188 (2023-24), nearly flat (-17).
What is the student-teacher ratio at Triad High School?
The student-teacher ratio at Triad High School is 16.2:1, which is 16% higher than the Illinois average of 14:1 and 3% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Triad High School?
The largest demographic group at Triad High School is White at 89.8% of enrollment, in Troy, IL.
What is the Resource Investment Index for Triad High School?
Triad High School has a Resource Investment Index of 33/100 (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 Triad High School rank among public schools in Troy?
By Resource Investment Index, Triad High School ranks #3 of 3 public schools in Troy, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking.
What other schools are in Triad Cusd 2?
Besides Triad High School, Triad Cusd 2 also operates Triad Middle School (925 students), Silver Creek Elementary (757 students), and C a Henning School (706 students). See the Triad Cusd 2 district page for the complete list.