- Enrollment
- 1,348
- Students per teacher
- 12:1
- Resource Index
- 26/100
Elementary school (grades K-5) · Brooklyn, NY
Ps 321 William Penn
Federal NCES profile for Ps 321 William Penn, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 53/100.
2024-25 NCES dataElementary school (grades K-5)NCES 360009202818
👥 S:T ratio 35
📋 Attendance 72
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Ps 321 William Penn earns 53/100 on the Resource Investment Index, with class sizes larger than 92% of New York schools. It is also one of the largest schools in New York.
- #11 of 95
- elementary schools in Brooklyn · Resource Index
- 53
- Resource Index · Higher
- 16.3:1
- large classes for New York
- 6.2%
- free-lunch eligible
Ps 321 William Penn has class sizes larger than 92% of New York schools. Computed live against every New York school reporting to NCES.
By Resource Investment Index, Ps 321 William Penn ranks #11 of 95 elementary schools in Brooklyn, NY.
School address
District: New York City Geographic District #15 · New York
NCES ID 360009202818 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+18 students YoY
Ps 321 William Penn held near 1,234 students from 2022-23 to 2023-24 (+18 headcount).
Teacher FTE added 80.0 → 81.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+18 students YoY 360009202818 · Brooklyn, NY Elementary · MID · TRAD
1,305 enr · 16.3:1 · 6.2% lunch · RII 53
Nearest enrollment peer: Sunset Park High School (1,348 students)
Ps 321 William Penn held near 1,234 students from 2022-23 to 2023-24 (+18 headcount). Teacher FTE added 80.0 → 81.0 across the same CCD years. Read with this school → · District book → · New York schools → · Find another →
Ps 321 William Penn in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Sunset Park Hi
Sunset Park High School
1,348 students
- This school
Ps 321 William Penn
1,305 students
- Ms 51 William
Ms 51 William Alexander
1,038 students
- Ps 230 Doris L
Ps 230 Doris L Cohen
925 students
- Ps 130 Parksid
Ps 130 Parkside (the)
891 students
- Brooklyn High
Brooklyn High School of the Arts
890 students
What this shows Ps 321 William Penn reports 1,305 students on the CCD universe file.
How Ps 321 William Penn compares
Ps 321 William Penn held steady on CCD headcount: 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 | 16.3:1 | ▲ 38% | 11.8:1 | 15.7:1 |
| Free-lunch eligible | 6.2% | ▼ 89% | 56.2% | 51.7% |
| Enrollment | 1,305 | top 4% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.3:1
Leaner classes than 36% of US schools, a middle-of-the-pack class size.
1,305
Bigger than 95% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
6.2%
free-lunch eligible
- 89% below the New York average of 56.2%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
16.3:1
students per teacher
- 38% above state mean
Top 92% in New York - lower ratio than 8% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
11.4%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
Student demographics
White 65.2%
Two or More 13.5%
Hispanic or Latino 9.7%
Asian 8.8%
African American 2.4%
American Indian / Alaska Native 0.4%
Largest group: White at 65.2% of enrollment.
Student-body diversity index 53.9/100
Simpson diversity index - at 53.9, Ps 321 William Penn is more mixed than the New York school average of 45.5.
How Ps 321 William Penn Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Sunset Park High School | Similar size | Higher economic need | Lower S:T ratio |
| Ms 51 William Alexander | Similar size | Higher economic need | Lower S:T ratio |
| Ps 230 Doris L Cohen | Smaller | Higher economic need | Lower S:T ratio |
| Ps 130 Parkside (the) | Smaller | Higher economic need | Similar S:T ratio |
| Brooklyn High School of the Arts | Smaller | Higher economic need | Lower S:T ratio |
Comparisons are relative to Ps 321 William Penn's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,038
- Students per teacher
- 13.7:1
- Resource Index
- 37/100
- Enrollment
- 925
- Students per teacher
- 12.8:1
- Resource Index
- 24/100
- Enrollment
- 891
- Students per teacher
- 16.2:1
- Resource Index
- 35/100
- Enrollment
- 890
- Students per teacher
- 12.9:1
- Resource Index
- 24/100
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 (~1,305 students)
Frequently asked questions about Ps 321 William Penn
How many students attend Ps 321 William Penn?
Ps 321 William Penn has 1,305 students enrolled. It is an elementary school in Brooklyn, NY. CCD year-over-year: 1,216 (2022-23) → 1,234 (2023-24), nearly flat (+18).
What is the student-teacher ratio at Ps 321 William Penn?
The student-teacher ratio at Ps 321 William Penn is 16.3:1, which is 38% higher than the New York average of 11.8:1 and 4% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Ps 321 William Penn?
6.2% of students at Ps 321 William Penn are eligible for free lunch, compared to the New York average of 56.2%.
What is the racial and ethnic makeup of Ps 321 William Penn?
The largest demographic group at Ps 321 William Penn is White at 65.2% of enrollment, in Brooklyn, NY. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 53.9/100.
What is the Resource Investment Index for Ps 321 William Penn?
Ps 321 William Penn has a Resource Investment Index of 53/100 (higher reported resources relative to schools nationally) based on 2 factors: student-teacher ratio, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology). Limited indicators were available, so the index reflects partial data.
How does Ps 321 William Penn rank among elementary schools in Brooklyn?
By Resource Investment Index, Ps 321 William Penn ranks #11 of 95 elementary schools in Brooklyn, NY. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Brooklyn on the city page.
What other schools are in New York City Geographic District #15?
Besides Ps 321 William Penn, New York City Geographic District #15 also operates Sunset Park High School (1,348 students), Ms 51 William Alexander (1,038 students), and Ps 230 Doris L Cohen (925 students). See the New York City Geographic District #15 district page for the complete list.