- Enrollment
- 1,234
- Students per teacher
- 14.7:1
- Resource Index
- 27/100
Other / mixed grade configuration · Yonkers, NY
School 21
Federal NCES profile for School 21, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 23/100.
2024-25 NCES dataOther / mixed grade configurationNCES 363192004264
👥 S:T ratio 38
🌟 Gifted program 30
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
School 21 earns 23/100 on the Resource Investment Index, with class sizes larger than 90% of New York schools.
- #12 of 33
- schools in Yonkers · Resource Index
- 23
- Resource Index · Lower
- 15.6:1
- large classes for New York
- 60.1%
- free-lunch eligible
School 21 has class sizes larger than 90% of New York schools. Computed live against every New York school reporting to NCES.
By Resource Investment Index, School 21 ranks #12 of 33 schools in Yonkers, NY.
School address
District: Yonkers City School District · New York
NCES ID 363192004264 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-50 students YoY
School 21 shrank from 356 students in 2022-23 to 306 in 2023-24 (-14.0%).
Teacher FTE held 21.5 → 21.6 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-50 students YoY 363192004264 · Yonkers, NY Other · SMALL · TRAD
328 enr · 15.6:1 · 60.1% lunch · RII 23
Nearest enrollment peer: Yonkers Montessori Academy (1,234 students)
School 21 shrank from 356 students in 2022-23 to 306 in 2023-24 (-14.0%). Teacher FTE held 21.5 → 21.6 across the same CCD years. Read with this school → · District book → · New York schools → · Find another →
School 21 in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Yonkers Montes
Yonkers Montessori Academy
1,234 students
- Lincoln High S
Lincoln High School
1,176 students
- Yonkers High S
Yonkers High School
1,111 students
- Roosevelt High
Roosevelt High School - Early College Studies
1,096 students
- Gorton High Sc
Gorton High School
1,068 students
- This school 328
School 21
328 students
What this shows School 21 reports 328 students on the CCD universe file.
How School 21 compares
School 21 is a shrinking campus on CCD: ratios and free-lunch share vs New York and U.S. means.
| Metric | This school | vs New York | New York avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 15.6:1 | ▲ 32% | 11.8:1 | 15.7:1 |
| Free-lunch eligible | 60.1% | ▲ 7% | 56.2% | 51.7% |
| Enrollment | 328 | top 70% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
15.6:1
Leaner classes than 41% of US schools, a middle-of-the-pack class size.
328
Bigger than 36% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
60.1%
free-lunch eligible
- 7% above the New York average of 56.2%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
15.6:1
students per teacher
- 32% above state mean
Top 90% in New York - lower ratio than 10% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
60.7%
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
$27,592
per pupil, district-wide
- below New York avg of $28,120
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 8 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 2.4 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 61.0%
White 17.7%
African American 10.1%
Asian 7.9%
Two or More 2.4%
American Indian / Alaska Native 0.9%
Largest group: Hispanic or Latino at 61.0% of enrollment.
Student-body diversity index 57.9/100
Simpson diversity index - at 57.9, School 21 is more mixed than the New York school average of 45.5.
Programs
District finance for Yonkers City School District reports $27,592 per pupil (NCES F-33) - open the district page for the full revenue mix.
How School 21 Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Yonkers Montessori Academy | Larger | Similar economic need | Similar S:T ratio |
| Lincoln High School | Larger | Higher economic need | Similar S:T ratio |
| Yonkers High School | Larger | Higher economic need | Similar S:T ratio |
| Roosevelt High School - Early College Studies | Larger | Higher economic need | Similar S:T ratio |
| Gorton High School | Larger | Higher economic need | Similar S:T ratio |
Comparisons are relative to School 21's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,176
- Students per teacher
- 16.6:1
- Resource Index
- 26/100
- Enrollment
- 1,111
- Students per teacher
- 16.3:1
- Resource Index
- 20/100
- Enrollment
- 1,096
- Students per teacher
- 15.7:1
- Resource Index
- 28/100
- Enrollment
- 1,068
- Students per teacher
- 14.8:1
- Resource Index
- 25/100
Nationwide other 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 (~328 students)
Frequently asked questions about School 21
How many students attend School 21?
School 21 has 328 students enrolled. It is a public school in Yonkers, NY. CCD year-over-year: 356 (2022-23) → 306 (2023-24), down 50.
What is the student-teacher ratio at School 21?
The student-teacher ratio at School 21 is 15.6:1, which is 32% higher than the New York average of 11.8:1 and 1% lower than the national average of 15.7:1.
What percentage of students receive free lunch at School 21?
60.1% of students at School 21 are eligible for free lunch, compared to the New York average of 56.2%.
What is the racial and ethnic makeup of School 21?
The largest demographic group at School 21 is Hispanic or Latino at 61.0% of enrollment, in Yonkers, NY. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 57.9/100.
What is the Resource Investment Index for School 21?
School 21 has a Resource Investment Index of 23/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, gifted-program reporting, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does School 21 rank among schools in Yonkers?
By Resource Investment Index, School 21 ranks #12 of 33 schools in Yonkers, NY. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Yonkers on the city page.
What other schools are in Yonkers City School District?
Besides School 21, Yonkers City School District also operates Yonkers Montessori Academy (1,234 students), Lincoln High School (1,176 students), and Yonkers High School (1,111 students). See the Yonkers City School District district page for the complete list.