Enrollment
430
New York · 2024-25 NCES data
Other / mixed grade configuration · Brooklyn, NY
Ps 21 Crispus Attucks
Federal NCES profile for Ps 21 Crispus Attucks, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 25/100.
2024-25 NCES dataOther / mixed grade configurationNCES 360009402108
👥 S:T ratio 44
🌟 Gifted program 30
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Ps 21 Crispus Attucks earns 25/100 on the Resource Investment Index, with class sizes larger than 79% of New York schools.
- #202 of 262
- schools in Brooklyn · Resource Index
- 25
- Resource Index · Lower
- 13.9:1
- large classes for New York
- 77.7%
- free-lunch eligible
Ps 21 Crispus Attucks has class sizes larger than 79% of New York schools. Computed live against every New York school reporting to NCES.
By Resource Investment Index, Ps 21 Crispus Attucks ranks #202 of 262 schools in Brooklyn, NY.
School address
District: New York City Geographic District #16 · New York
NCES ID 360009402108 Verify on NCES CCD record →
Teachers (FTE)
31.0
Federal CCD staff survey
Students per teacher
13.9:1
vs 11.8:1 New York avg
+18% vs state
Free-lunch eligible
77.7%
vs 56.2% New York avg
+38% vs state
Student-teacher ratio in context
How Ps 21 Crispus Attucks compares with New York and U.S. medians
What stands out at Ps 21 Crispus Attucks
Ps 21 Crispus Attucks is a high-poverty, mid-sized combined-grade school in Brooklyn, New York, enrolling 430 students.
Class loads run somewhat heavier than typical: 13.9:1 puts it in the larger third of New York schools by student-teacher ratio.
Economic need runs somewhat above the state's typical profile, with 77.7% of students eligible for free meals.
With 430 students, its enrollment sits close to the New York median campus size.
Its Resource Investment Index trails 93% of the 4,801 New York schools with a score on record, one of the lower results on this measure.
Among 924 similarly sized, similarly resourced-need New York schools statewide, it ranks #738, in the lower tier once campus size and economic need are matched.
Its student body is predominantly African American (84% of enrollment) (diversity index 28/100).
Chronic absenteeism is elevated: 67.9% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
New York City Geographic District #16 also operates Brooklyn High School for Law and Technology (469 students) and Ps 40 George W Carver (465 students) alongside Ps 21 Crispus Attucks.
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 Ps 21 Crispus Attucks compares
Ps 21 Crispus Attucks on the metrics families compare, against New York and U.S. means.
| Metric | This school | vs New York | New York avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 13.9:1 | ▲ 18% | 11.8:1 | 15.7:1 |
| Free-lunch eligible | 77.7% | ▲ 38% | 56.2% | 51.7% |
| Enrollment | 430 | top 49% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.9:1
Leaner classes than 58% of US schools, a middle-of-the-pack class size.
430
Bigger than 52% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
77.7%
free-lunch eligible
- 38% 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
13.9:1
students per teacher
- 18% above state mean
Top 79% in New York - lower ratio than 21% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
67.9%
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.
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
African American 83.5%
Hispanic or Latino 14.4%
White 0.9%
Two or More 0.7%
American Indian / Alaska Native 0.5%
Largest group: African American at 83.5% of enrollment.
Student-body diversity index 28.2/100
Simpson diversity index - at 28.2, Ps 21 Crispus Attucks is less mixed than the New York school average of 45.5.
How Ps 21 Crispus Attucks Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Brooklyn High School for Law and Technology | Similar size | Similar economic need | Lower S:T ratio |
| Ps 40 George W Carver | Similar size | Higher economic need | Lower S:T ratio |
| Boys and Girls High School | Similar size | Similar economic need | Lower S:T ratio |
| Brooklyn Brownstone School | Similar size | Lower economic need | Higher S:T ratio |
| Brooklyn Academy of Global Finance (the) | Smaller | Higher economic need | Lower S:T ratio |
Comparisons are relative to Ps 21 Crispus Attucks's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 469
- Students per teacher
- 12.3:1
- Resource Index
- 25/100
- Enrollment
- 465
- Students per teacher
- 11.6:1
- Resource Index
- 27/100
- Enrollment
- 353
- Students per teacher
- 7.5:1
- Resource Index
- 35/100
- Enrollment
- 352
- Students per teacher
- 17.6:1
- Resource Index
- 23/100
- Enrollment
- 222
- Students per teacher
- 10.1:1
- Resource Index
- 30/100
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of New York, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~430 students)
Similar student-teacher ratio (~13.9:1)
Next steps
Verify locally before acting on Ps 21 Crispus Attucks's federal record.
- Compare Ps 21 Crispus Attucks against another school. Compare schools
- New York City Geographic District #16'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 Ps 21 Crispus Attucks
How many students attend Ps 21 Crispus Attucks?
Ps 21 Crispus Attucks has 430 students enrolled. It is a public school in Brooklyn, NY.
What is the student-teacher ratio at Ps 21 Crispus Attucks?
The student-teacher ratio at Ps 21 Crispus Attucks is 13.9:1, which is 18% higher than the New York average of 11.8:1 and 11% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Ps 21 Crispus Attucks?
77.7% of students at Ps 21 Crispus Attucks are eligible for free lunch, compared to the New York average of 56.2%.
What is the racial and ethnic makeup of Ps 21 Crispus Attucks?
The largest demographic group at Ps 21 Crispus Attucks is African American at 83.5% of enrollment, in Brooklyn, NY.
What is the Resource Investment Index for Ps 21 Crispus Attucks?
Ps 21 Crispus Attucks has a Resource Investment Index of 25/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Ps 21 Crispus Attucks rank among schools in Brooklyn?
By Resource Investment Index, Ps 21 Crispus Attucks ranks #202 of 262 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 schools in Brooklyn on the city page.
Is Ps 21 Crispus Attucks a good school?
Ps 21 Crispus Attucks earns 25/100 on the Resource Investment Index, with class sizes larger than 79% of New York 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 New York City Geographic District #16?
Besides Ps 21 Crispus Attucks, New York City Geographic District #16 also operates Brooklyn High School for Law and Technology (469 students), Ps 40 George W Carver (465 students), and Boys and Girls High School (353 students). See the New York City Geographic District #16 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.