Enrollment
146
Illinois · 2024-25 NCES data
Other / mixed grade configuration · Ullin, IL
Century Jr/Sr High School
Federal NCES profile for Century Jr/Sr High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 41/100.
2024-25 NCES dataOther / mixed grade configurationNCES 173963004003
👥 S:T ratio 61
🌟 Gifted program 30
🎓 Counselors 71
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Century Jr/Sr High School earns 41/100 on the Resource Investment Index, with class sizes smaller than 92% of Illinois schools.
- 41
- Resource Index · Typical
- 9.7:1
- small classes for Illinois
- 146
- students enrolled
Century Jr/Sr High School has class sizes smaller than 92% of Illinois schools. Computed live against every Illinois school reporting to NCES.
School address
District: Century Cusd 100 · Illinois
NCES ID 173963004003 Verify on NCES CCD record →
Teachers (FTE)
15.0
Federal CCD staff survey
Students per teacher
9.7:1
vs 14:1 Illinois avg
-31% vs state
Student-teacher ratio in context
How Century Jr/Sr High School compares with Illinois and U.S. medians
What stands out at Century Jr/Sr High School
Century Jr/Sr High School is a small combined-grade school in Ullin, Illinois, enrolling 146 students.
Classes run notably small here: at 9.7:1, Century Jr/Sr High School is leaner than roughly 92% of Illinois schools and 31% under the state's 14:1 norm, more adult attention per pupil than most peers.
Enrollment of 146 puts it in the smaller third of Illinois schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 3,845 scored Illinois schools.
Its student body is predominantly White (86% of enrollment) (diversity index 26/100).
Counselor coverage is strong, about 146 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 44.5% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Its district draws 27.5% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Among Ullin's public schools, it stands alongside Century Elementary School (185 students): Century Jr/Sr High School is smaller than that campus by headcount and runs leaner classes (9.7:1 vs 12.3:1).
Its district, Century Cusd 100, also runs Century Elementary School (185 students).
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 Century Jr/Sr High School compares
Century Jr/Sr 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 | 9.7:1 | ▼ 31% | 14:1 | 15.7:1 |
| Enrollment | 146 | top 90% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
9.7:1
Leaner classes than 90% of US schools, among the more generously staffed nationally.
146
Bigger than 14% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Staffing depth
9.7:1
students per teacher
- 31% below state mean
Top 8% in Illinois - lower ratio than 92% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
44.5%
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
$14,870
per pupil, district-wide
- below Illinois avg of $17,042
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors1.0 FTE
Per 146 students, the combined health-and-guidance staffing load for this school.
Discipline context
14
in-school suspensions + 1 out-of-school
Suspension rate: 9.6 per 100 students. Combined in-school and out-of-school rate: 10.3 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 85.6%
African American 6.8%
Two or More 6.2%
Hispanic or Latino 1.4%
Largest group: White at 85.6% of enrollment.
Student-body diversity index 25.9/100
Simpson diversity index - at 25.9, Century Jr/Sr High School is less mixed than the Illinois school average of 38.9.
Programs
Funding & spending
District-wide per-pupil expenditure for Century Cusd 100, which includes Century Jr/Sr High School.
$14,870
Per student
-13%
vs Illinois
Avg $17,042
-10%
vs U.S.
Avg $16,593
Revenue mix
Local 17.2%
State 55.3%
Federal 27.5%
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 Century Jr/Sr High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Century Elementary School | Larger | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Century Jr/Sr High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 185
- Students per teacher
- 12.3:1
- Resource Index
- 37/100
Similar other schools in Ullin
1 comparable other schools (grades Mixed) serving the same city.
Similar other 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 (~146 students)
Next steps
Verify locally before acting on Century Jr/Sr High School's federal record.
- Compare Century Jr/Sr High School against another school. Compare schools
- Century Cusd 100'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 Century Jr/Sr High School
How many students attend Century Jr/Sr High School?
Century Jr/Sr High School has 146 students enrolled. It is a public school in Ullin, IL.
What is the student-teacher ratio at Century Jr/Sr High School?
The student-teacher ratio at Century Jr/Sr High School is 9.7:1, which is 31% lower than the Illinois average of 14:1 and 38% 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 Century Jr/Sr High School?
The largest demographic group at Century Jr/Sr High School is White at 85.6% of enrollment, in Ullin, IL.
What is the Resource Investment Index for Century Jr/Sr High School?
Century Jr/Sr High School has a Resource Investment Index of 41/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
Is Century Jr/Sr High School a good school?
Century Jr/Sr High School earns 41/100 on the Resource Investment Index, with class sizes smaller than 92% 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 Century Cusd 100?
Besides Century Jr/Sr High School, Century Cusd 100 also operates Century Elementary School (185 students). See the Century Cusd 100 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.