Enrollment
380
Elementary
DISTRICT 529 · STATE 443
SCHOOL COMMUNITY·NEW YORK CITY GEOGRAPHIC DISTRICT #31·NCES 360010302110
PS 21 MARGARET EMERY-ELM PARK
168 HOOKER PL, STATEN ISLAND, NY 10302 · (718) 816-3300 · Richmond County
GRADES PK–05ELEMENTARY11-CITYTITLE IREGULAR SCHOOL380 STUDENTS
B+
allk12 Grade
Scored higher than 70% of New York public elementary schools
- BTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- A-Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- ·Three-year trend Not available for this school, so the grade uses the other parts.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded New York public elementary schools
Student : Teacher
11.2:1
34 FTE teachers
DISTRICT 12.3:1 · STATE 12.8:1
Free / Reduced Lunch
89%
337 students
DISTRICT 69% · STATE 58%
Community
0
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Pre-K | 49 | 13% |
| Kindergarten | 52 | 14% |
| Grade 1 | 52 | 14% |
| Grade 2 | 53 | 14% |
| Grade 3 | 65 | 17% |
| Grade 4 | 53 | 14% |
| Grade 5 | 56 | 15% |
This year's kindergarten class (52) is 7% smaller than its 5th grade class (56).
Student demographics
52%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 72% · STATE 72% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
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START A DISCUSSIONTest scores
NYS Assessments 2024-25 . % Proficient (Level 3 + Level 4)English Language Arts
62.0%
NY avg 58.3% . +2.0pp since 2023
Math
62.0%
NY avg 57.4% . -3.0pp since 2023
What this means: On the NYS Assessments, New York's statewide test, about 62 of every 100 students at this school read and write at grade level and about 62 of 100 do math at grade level. Across all New York schools, those numbers are about 58 and 57. Reading and writing scores are up about 2 points since 2023, while math scores are down about 3 points.
NYS Assessments results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 62.0% | 62.0% |
| 2023-24 | 60.0% | 65.0% |
% Proficient (Level 3 + Level 4), all students and all tested grades.
Source: NYS Assessments. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
55.8%
composite math + reading, all grades
Predicted
42.4%
based on NY schools with similar FRL share
Beats by
+13.4pp
above demographic expectation
What this means: About 56% of students here test proficient in math and reading, compared with the roughly 42% typical for New York schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among New York's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like PS 21 MARGARET EMERY-ELM PARK
PS 21 MARGARET EMERY-ELM PARK's state test result (55.8% proficient) is higher than 5 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| PS 21 MARGARET EMERY-ELM PARK this school | 380 | 88.7% | 55.8% |
| PS 380 JOHN WAYNE ELEMENTARY BROOKLYN | 390 | 90.0% | 47.1% |
| PS 76 WILLIAM HALLET LONG ISLAND CITY | 397 | 89.9% | 42.3% |
| PS 153 ADAM CLAYTON POWELL NEW YORK | 387 | 89.1% | 32.8% |
| BROOKLYN RISE CHARTER SCHOOL BROOKLYN | 336 | 89.6% | 45.4% |
| BRONX ARTS AND SCIENCE CHARTER SCHOOL BRONX | 428 | 90.7% | 41.1% |
Matched among New York elementary schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where PS 21 MARGARET EMERY-ELM PARK ranks
Among elementary schools| Measure | This school | In New York | In Richmond County |
|---|---|---|---|
| State test proficiency ranked highest first | 55.8% | #929 of 2,335 | #31 of 53 |
| Math proficiency ranked highest first | 62.0% | #1,001 of 2,342 ▼ 271 | #32 of 53 ▼ 5 |
| Reading proficiency ranked highest first | 62.0% | #841 of 2,343 ▼ 327 | #29 of 53 ▼ 5 |
| Enrollment ranked largest first | 380 | #1,482 of 2,585 | #36 of 55 |
| Students per teacher ranked fewest first | 11.2:1 | #918 of 2,338 | #18 of 52 |
| Diversity index ranked most diverse first | 52.1% | #1,141 of 2,388 | #41 of 52 |
| Free and reduced lunch ranked highest share first | 88.7% | #473 of 2,534 | #15 of 55 |
| Enrollment change since 2017-18 ranked fastest growth first | +4.4% | #415 of 606 | #9 of 15 |
Ranked against other public elementary schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
380
-20 (-5%) vs 2020
-20% since 2010-11, when it was 474
Student : Teacher
11.2:1
was 11.1:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 380 | 34 | 11.2:1 | 89% (337) |
| 2023-24 | 393 | 37.6 | 10.5:1 | 88% (344) |
| 2022-23 | 393 | 39.1 | 10.0:1 | 86% (338) |
| 2020-21 | 400 | 36 | 11.1:1 | 85% (340) |
| 2017-18 | 364 | 34 | 10.7:1 | 81% (294) |
| 2015-16 | 407 | 33 | 12.3:1 | 73% (297) |
| 2010-11 | 474 | 39 | 12.2:1 | 94% (446) |
Source: NCES Common Core of Data. Rows are the federal collections on file for PS 21 MARGARET EMERY-ELM PARK.
About PS 21 MARGARET EMERY-ELM PARK
PS 21 MARGARET EMERY-ELM PARK is a public elementary school run by NEW YORK CITY GEOGRAPHIC DISTRICT #31 in STATEN ISLAND, New York. It had 380 students in 2024-25, spanning pre-K through 5.
NEW YORK CITY GEOGRAPHIC DISTRICT #31 serves 56,577 students across 74 schools.
The share of Hispanic students at PS 21 MARGARET EMERY-ELM PARK is 67%, a majority. The school is also 15% Black, 10% White, and 5% Asian. That is higher than the 20% Hispanic share among all Richmond County residents. Its diversity index, the chance that two randomly chosen students belong to different racial or ethnic groups, is 52%.
The school has 34 full-time-equivalent teachers and a ratio of 11.2 students per teacher. The average for elementary schools in New York is 12.8:1, so this school has fewer students per teacher. The school reported 89% of students eligible for free or reduced-price lunch in 2024-25. For comparison, public schools in Richmond County average 67%.
PS 21 MARGARET EMERY-ELM PARK holds a B+ allk12 Grade, placing it above 70% of New York public elementary schools.
The model predicts 42.4% for a school in New York with PS 21 MARGARET EMERY-ELM PARK's free or reduced-price lunch share. PS 21 MARGARET EMERY-ELM PARK posts 55.8%.
Looking at the county, Richmond County, the median household earns about $98,333 a year, the share of adults with a bachelor's degree or higher is 36%, and roughly 9% of residents are in poverty. Richmond County has 88 public schools with about 62,254 students, including PS 21 MARGARET EMERY-ELM PARK.
NEW WORLD PREPARATORY CHARTER SCHOOL, about 0.1 miles away, is the closest public school. A five-mile radius around the school includes at least 8 other public schools. By average proficiency, PS 21 MARGARET EMERY-ELM PARK is 1st among 9 schools close by.
In the federal locale system, PS 21 MARGARET EMERY-ELM PARK is coded City: Large, for schools inside a principal city with a population of 250,000 or more.
Over 4 years, enrollment decreased by 20 students, from 400 to 380.
Use the discussion section to ask about special education services, counseling, and support programs at PS 21 MARGARET EMERY-ELM PARK. You can also rate the school on this page.
Richmond County at a glance
View full county profilePopulation
494,956
Census ACS
Median income
$98,333
Household, ACS
Bachelor's+
36%
Adults 25+
Poverty rate
9%
Below federal line
Schools in county
88
62,254 students
Quick facts
Related schools
Other schools in NEW YORK CITY GEOGRAPHIC DISTRICT #31
- TOTTENVILLE HIGH SCHOOLHigh · 3,750 students
- NEW DORP HIGH SCHOOLHigh · 3,055 students
- SUSAN E WAGNER HIGH SCHOOLHigh · 2,743 students
- CURTIS HIGH SCHOOLHigh · 2,439 students
- PORT RICHMOND HIGH SCHOOLHigh · 1,696 students
- IS 72 ROCCO LAURIEMiddle · 1,532 students
Other schools in STATEN ISLAND
- TOTTENVILLE HIGH SCHOOLHigh · 3,750 students
- NEW DORP HIGH SCHOOLHigh · 3,055 students
- SUSAN E WAGNER HIGH SCHOOLHigh · 2,743 students
- CURTIS HIGH SCHOOLHigh · 2,439 students
- PORT RICHMOND HIGH SCHOOLHigh · 1,696 students
- IS 72 ROCCO LAURIEMiddle · 1,532 students
Nearby schools
- NEW WORLD PREPARATORY CHARTER SCHOOL0.1 mi · 803
- PORT RICHMOND HIGH SCHOOL0.3 mi · 1,696
- PORT RICHMOND SCHOOL FOR VISIONARY LEARNING0.4 mi · 377
- PS 22 GRANITEVILLE0.5 mi · 717
- IS 51 EDWIN MARKHAM0.6 mi · 1,072
- PS 44 THOMAS C BROWN0.6 mi · 521
Frequently asked questions
About PS 21 MARGARET EMERY-ELM PARKHow large is PS 21 MARGARET EMERY-ELM PARK?
PS 21 MARGARET EMERY-ELM PARK enrolls approximately 380 students in grades PK-05.
What age range does PS 21 MARGARET EMERY-ELM PARK serve?
PS 21 MARGARET EMERY-ELM PARK serves students from grade PK through grade 05.
How many students per teacher at PS 21 MARGARET EMERY-ELM PARK?
Approximately 11.2:1 students per teacher at PS 21 MARGARET EMERY-ELM PARK.
What is the racial breakdown of students at PS 21 MARGARET EMERY-ELM PARK?
At PS 21 MARGARET EMERY-ELM PARK, the student body is approximately 10% White, 67% Hispanic, 15% Black, 5% Asian, 2% Two or more.
What district is PS 21 MARGARET EMERY-ELM PARK in?
PS 21 MARGARET EMERY-ELM PARK is part of NEW YORK CITY GEOGRAPHIC DISTRICT #31.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.