- Enrollment
- 319
- Students per teacher
- 14.5:1
- Resource Index
- 24/100
Elementary school (grades K-5) · Mendota, IL
Northbrook School
Federal NCES profile for Northbrook School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 23/100.
2024-25 NCES dataElementary school (grades K-5)NCES 172562002773
👥 S:T ratio 42
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 21
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Northbrook School earns 23/100 on the Resource Investment Index, with class sizes near the Illinois median.
- #3 of 3
- elementary schools in Mendota · Resource Index
- 23
- Resource Index · Lower
- 14.6:1
- students per teacher
- 526
- students enrolled
Northbrook School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Northbrook School ranks #3 of 3 elementary schools in Mendota, IL.
School address
District: Mendota Ccsd 289 · Illinois
NCES ID 172562002773 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-27 students YoY
Northbrook School shrank from 508 students in 2022-23 to 481 in 2023-24 (-5.3%).
Teacher FTE lost 36.5 → 36.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-27 students YoY 172562002773 · Mendota, IL Elementary · MID · TRAD
526 enr · 14.6:1 · RII 23
Nearest enrollment peer: Lincoln Elem School (319 students)
Northbrook School shrank from 508 students in 2022-23 to 481 in 2023-24 (-5.3%). Teacher FTE lost 36.5 → 36.0 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
Northbrook School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- This school
Northbrook School
526 students
- Lincoln Elem S
Lincoln Elem School
319 students
- Blackstone Ele 197
Blackstone Elem School
197 students
What this shows Northbrook School reports 526 students on the CCD universe file.
How Northbrook School compares
Northbrook 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 | 14.6:1 | ▲ 4% | 14:1 | 15.7:1 |
| Enrollment | 526 | top 27% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.6:1
Leaner classes than 51% of US schools, a middle-of-the-pack class size.
526
Bigger than 65% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Staffing depth
14.6:1
students per teacher
- 4% above state mean
Top 64% in Illinois - lower ratio than 36% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
31.7%
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
$13,901
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
Counselors1.0 FTE
Per 526 students, the combined health-and-guidance staffing load for this school.
Discipline context
43
in-school suspensions + 27 out-of-school
Suspension rate: 8.2 per 100 students. Combined in-school and out-of-school rate: 13.3 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 54.2%
Hispanic or Latino 40.3%
Two or More 3.1%
African American 2.3%
American Indian / Alaska Native 0.2%
Largest group: White at 54.2% of enrollment.
Student-body diversity index 54.2/100
Simpson diversity index - at 54.2, Northbrook School is more mixed than the Illinois school average of 38.9.
Programs
District finance for Mendota Ccsd 289 reports $13,901 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Northbrook School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Lincoln Elem School | Smaller | No free-lunch data | Similar S:T ratio |
| Blackstone Elem School | Smaller | No free-lunch data | Lower S:T ratio |
Comparisons are relative to Northbrook School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 197
- Students per teacher
- 11.6:1
- Resource Index
- 28/100
Similar elementary schools in Mendota
2 comparable elementary schools (grades K-5) serving the same city.
Nationwide elementary 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 (~526 students)
Frequently asked questions about Northbrook School
How many students attend Northbrook School?
Northbrook School has 526 students enrolled. It is an elementary school in Mendota, IL. CCD year-over-year: 508 (2022-23) → 481 (2023-24), down 27.
What is the student-teacher ratio at Northbrook School?
The student-teacher ratio at Northbrook School is 14.6:1, which is 4% higher than the Illinois average of 14:1 and 7% lower than the national average of 15.7:1.
What is the racial and ethnic makeup of Northbrook School?
The largest demographic group at Northbrook School is White at 54.2% of enrollment, in Mendota, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 54.2/100.
What is the Resource Investment Index for Northbrook School?
Northbrook School has a Resource Investment Index of 23/100 (lower 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 Northbrook School rank among elementary schools in Mendota?
By Resource Investment Index, Northbrook School ranks #3 of 3 elementary schools in Mendota, 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 Mendota Ccsd 289?
Besides Northbrook School, Mendota Ccsd 289 also operates Lincoln Elem School (319 students) and Blackstone Elem School (197 students). See the Mendota Ccsd 289 district page for the complete list.