Enrollment
1,038
New York · 2024-25 NCES data
Middle school (grades 6-8) · Brooklyn, NY
Ms 51 William Alexander
Federal NCES profile for Ms 51 William Alexander, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 35/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 360009202226
👥 S:T ratio 45
🌟 Gifted program 30
📋 Attendance 30
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Ms 51 William Alexander earns 35/100 on the Resource Investment Index, with class sizes larger than 78% of New York schools. It is also more racially and ethnically mixed than most New York schools.
- #29 of 94
- middle schools in Brooklyn · Resource Index
- 35
- Resource Index · Typical
- 13.7:1
- large classes for New York
- 57.0%
- free-lunch eligible
Ms 51 William Alexander has class sizes larger than 78% of New York schools. Computed live against every New York school reporting to NCES.
By Resource Investment Index, Ms 51 William Alexander ranks #29 of 94 middle schools in Brooklyn, NY.
School address
District: New York City Geographic District #15 · New York
NCES ID 360009202226 Verify on NCES CCD record →
Teachers (FTE)
76.0
Federal CCD staff survey
Students per teacher
13.7:1
vs 11.8:1 New York avg
+16% vs state
Free-lunch eligible
57.0%
vs 56.2% New York avg
+1% vs state
Student-teacher ratio in context
How Ms 51 William Alexander compares with New York and U.S. medians
What stands out at Ms 51 William Alexander
Ms 51 William Alexander is a higher-need, large middle school in Brooklyn, New York, enrolling 1,038 students.
Class loads run somewhat heavier than typical: 13.7:1 puts it in the larger third of New York schools by student-teacher ratio.
Its free-meal eligibility rate of 57.0% lands close to the New York typical range, neither a high- nor low-need campus by this measure.
By headcount it is one of the larger campuses in New York, bigger than 92% of state schools at 1,038 students.
Its Resource Investment Index sits near the middle of the pack among 4,801 scored New York schools.
Against 279 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #102.
Its student body is led by Hispanic or Latino (32%) and Asian (28%), more mixed than most schools in the state (diversity index 74/100).
Chronic absenteeism is elevated: 28.2% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
New York City Geographic District #15 also operates Sunset Park High School (1,348 students) and Ps 321 William Penn (1,305 students) alongside Ms 51 William Alexander.
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 Ms 51 William Alexander compares
Ms 51 William Alexander 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 | 13.7:1 | ▲ 16% | 11.8:1 | 15.7:1 |
| Free-lunch eligible | 57.0% | ▲ 1% | 56.2% | 51.7% |
| Enrollment | 1,038 | top 8% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.7:1
Leaner classes than 60% of US schools, a middle-of-the-pack class size.
1,038
Bigger than 92% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
57.0%
free-lunch eligible
- 1% 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
13.7:1
students per teacher
- 16% above state mean
Top 78% in New York - lower ratio than 22% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
28.2%
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
Hispanic or Latino 32.1%
Asian 27.5%
White 25.9%
Two or More 7.1%
African American 7.0%
American Indian / Alaska Native 0.3%
Native Hawaiian / Pacific Islander 0.1%
Largest group: Hispanic or Latino at 32.1% of enrollment.
Student-body diversity index 74.4/100
Simpson diversity index - at 74.4, Ms 51 William Alexander is more mixed than the New York school average of 45.5.
How Ms 51 William Alexander Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Sunset Park High School | Larger | Higher economic need | Lower S:T ratio |
| Ps 321 William Penn | Larger | Lower economic need | Higher S:T ratio |
| Ps 230 Doris L Cohen | Similar size | Higher economic need | Similar S:T ratio |
| Ps 130 Parkside (the) | Similar size | Lower economic need | Higher S:T ratio |
| Brooklyn High School of the Arts | Similar size | Similar economic need | Similar S:T ratio |
Comparisons are relative to Ms 51 William Alexander's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,348
- Students per teacher
- 12:1
- Resource Index
- 26/100
- Enrollment
- 1,305
- Students per teacher
- 16.3:1
- Resource Index
- 53/100
- 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
Similar middle 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 (~1,038 students)
Similar student-teacher ratio (~13.7:1)
Next steps
Verify locally before acting on Ms 51 William Alexander's federal record.
- Compare Ms 51 William Alexander against another school. Compare schools
- New York City Geographic District #15'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 Ms 51 William Alexander
How many students attend Ms 51 William Alexander?
Ms 51 William Alexander has 1,038 students enrolled. It is a middle school in Brooklyn, NY.
What is the student-teacher ratio at Ms 51 William Alexander?
The student-teacher ratio at Ms 51 William Alexander is 13.7:1, which is 16% higher than the New York average of 11.8:1 and 13% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Ms 51 William Alexander?
57.0% of students at Ms 51 William Alexander are eligible for free lunch, compared to the New York average of 56.2%.
What is the racial and ethnic makeup of Ms 51 William Alexander?
The largest demographic group at Ms 51 William Alexander is Hispanic or Latino at 32.1% of enrollment, in Brooklyn, NY. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 74.4/100.
What is the Resource Investment Index for Ms 51 William Alexander?
Ms 51 William Alexander has a Resource Investment Index of 35/100 (typical 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 Ms 51 William Alexander rank among middle schools in Brooklyn?
By Resource Investment Index, Ms 51 William Alexander ranks #29 of 94 middle 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 middle schools in Brooklyn on the city page.
Is Ms 51 William Alexander a good school?
Ms 51 William Alexander earns 35/100 on the Resource Investment Index, with class sizes larger than 78% of New York schools. It is also more racially and ethnically mixed than most 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 #15?
Besides Ms 51 William Alexander, New York City Geographic District #15 also operates Sunset Park High School (1,348 students), Ps 321 William Penn (1,305 students), and Ps 230 Doris L Cohen (925 students). See the New York City Geographic District #15 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.