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Does WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL have enough mental health and stress support?
Community prompt from u/allk12. Replies below.
Enrollment
525
Elementary
DISTRICT 576 · STATE 443
SCHOOL COMMUNITY·THREE VILLAGE CENTRAL SCHOOL DISTRICT·NCES 362820003810
WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL
50 DEAN LN, STONY BROOK, NY 11790 · (631) 730-4300 · Suffolk County
GRADES PK–06ELEMENTARY21-SUBURBREGULAR SCHOOL525 STUDENTS
B
allk12 Grade
Scored higher than 59% of New York public elementary schools
- B+Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- B-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
13.1:1
40 FTE teachers
DISTRICT 12.2:1 · STATE 12.8:1
Free / Reduced Lunch
20%
107 students
DISTRICT 15% · STATE 58%
Community
1
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 | 39 | 7% |
| Kindergarten | 61 | 12% |
| Grade 1 | 61 | 12% |
| Grade 2 | 61 | 12% |
| Grade 3 | 74 | 14% |
| Grade 4 | 81 | 15% |
| Grade 5 | 75 | 14% |
| Grade 6 | 73 | 14% |
This year's kindergarten class (61) is 16% smaller than its 6th grade class (73).
Student demographics
61%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 52% · 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
Test scores
NYS Assessments 2024-25 . % Proficient (Level 3 + Level 4)English Language Arts
59.0%
NY avg 58.3% . +5.0pp since 2023
Math
67.0%
NY avg 57.4% . +5.0pp since 2023
What this means: On the NYS Assessments, New York's statewide test, about 59 of every 100 students at this school read and write at grade level and about 67 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 5 points since 2023, while math scores are up about 5 points.
NYS Assessments results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 59.0% | 67.0% |
| 2023-24 | 54.0% | 62.0% |
% 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
61.0%
composite math + reading, all grades
Predicted
67.5%
based on NY schools with similar FRL share
Beats by
-6.5pp
below demographic expectation
What this means: About 61% of students here test proficient in math and reading, compared with the roughly 68% 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 WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL
WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL's state test result (61.0% proficient) is higher than 0 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL this school | 525 | 20.4% | 61.0% |
| SKANO ELEMENTARY SCHOOL CLIFTON PARK | 524 | 18.7% | 75.7% |
| JOHN STREET SCHOOL FRANKLIN SQUARE | 483 | 19.7% | 68.9% |
| EAST HILLS ELEMENTARY SCHOOL ROSLYN HEIGHTS | 552 | 20.8% | 80.0% |
| PS 199 JESSIE ISADOR STRAUS NEW YORK | 570 | 23.9% | 78.6% |
| GUILDERLAND ELEMENTARY SCHOOL GUILDERLAND | 470 | 25.1% | 67.0% |
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 WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL ranks
Among elementary schools| Measure | This school | In New York | In Suffolk County |
|---|---|---|---|
| State test proficiency ranked highest first | 61.0% | #716 of 2,335 | #42 of 168 |
| Math proficiency ranked highest first | 67.0% | #828 of 2,342 ▲ 39 | #54 of 169 no change |
| Reading proficiency ranked highest first | 59.0% | #1,006 of 2,343 ▼ 265 | #62 of 169 ▼ 24 |
| Enrollment ranked largest first | 525 | #716 of 2,585 | #66 of 209 |
| Students per teacher ranked fewest first | 13.1:1 | #1,643 of 2,338 | #146 of 196 |
| Diversity index ranked most diverse first | 61.5% | #641 of 2,388 | #55 of 197 |
| Free and reduced lunch ranked highest share first | 20.4% | #2,222 of 2,534 | #143 of 200 |
| Enrollment change since 2017-18 ranked fastest growth first | +10.3% | #261 of 606 | #22 of 57 |
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
525
+70 (+15%) vs 2020
-14% since 1990-91, when it was 614
Student : Teacher
13.1:1
was 12.0:1
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 | 525 | 40.2 | 13.1:1 | 20% (107) |
| 2023-24 | 514 | 37.8 | 13.6:1 | 20% (103) |
| 2022-23 | 511 | 42 | 12.2:1 | 17% (88) |
| 2020-21 | 455 | 38 | 12.0:1 | 12% (56) |
| 2017-18 | 476 | 32 | 14.9:1 | 0% (0) |
| 2015-16 | 555 | 36 | 15.4:1 | 5% (26) |
| 2010-11 | 723 | 54 | 13.4:1 | 3% (21) |
| 2000-01 | 881 | 57 | 15.5:1 | 2% (16) |
| 1990-91 | 614 | 44 | 13.9:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL.
About WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL
WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL is a mid-sized elementary school with an address in STONY BROOK, New York. It teaches 525 students in pre-K through 6.
WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL is one of 8 schools in THREE VILLAGE CENTRAL SCHOOL DISTRICT, which enrolls 5,629 students in total.
The student body at WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL is 55% White. Beyond that, enrollment is 24% Asian, 14% Hispanic, and 5% multiracial. The White share of the county population is higher, at 66%. Its diversity index, the chance that two randomly chosen students belong to different racial or ethnic groups, is 61%.
WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL lists 40.2 full-time-equivalent teachers; that is about 13.1 students per teacher. The 12.8:1 average for elementary schools in New York is close to this figure. About 20% of students at WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL are eligible for free or reduced-price lunch. The average for public schools in Suffolk County is 39%.
WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL holds a B allk12 Grade, placing it above 59% of New York public elementary schools.
The BeatsExpectations prediction for WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL is 67.5%, and its average proficiency rate across its state test results is 61.0%.
Suffolk County is the school's county. There, median household income comes to about $130,686, the share of adults with a bachelor's degree or higher is 40%, and about 4% of people live in poverty. Suffolk County's 343 public schools enroll about 222,439 students and include WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL.
WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL's closest public school neighbor is ROBERT CUSHMAN MURPHY JUNIOR HIGH SCHOOL, about 1.2 miles away. Within five miles of WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL, there are at least 8 other public schools. Of 9 schools in the immediate area with test results, WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL ranks 7th on average proficiency.
Locale data from NCES put WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more (Suburb: Large).
Between 2020-21 and 2024-25, WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL had a net gain of 70 students, or 15%. The ratio of students to teachers went from 12.0:1 to 13.1:1 over the same years.
People can post here about open houses, carpools, and field trips and other school topics. Parents, students, alumni, and staff are welcome to post.
Suffolk County at a glance
View full county profilePopulation
1,530,146
Census ACS
Median income
$130,686
Household, ACS
Bachelor's+
40%
Adults 25+
Poverty rate
4%
Below federal line
Schools in county
343
222,439 students
Quick facts
Related schools
Other schools in THREE VILLAGE CENTRAL SCHOOL DISTRICT
- WARD MELVILLE SENIOR HIGH SCHOOLHigh · 1,442 students
- ROBERT CUSHMAN MURPHY JUNIOR HIGH SCHOOLMiddle · 655 students
- PAUL J GELINAS JUNIOR HIGH SCHOOLMiddle · 651 students
- MINNESAUKE ELEMENTARY SCHOOLElementary · 644 students
- SETAUKET ELEMENTARY SCHOOLElementary · 599 students
- ARROWHEAD ELEMENTARY SCHOOLElementary · 562 students
Other schools in STONY BROOK
- ROBERT CUSHMAN MURPHY JUNIOR HIGH SCHOOLMiddle · 655 students
Nearby schools
- ROBERT CUSHMAN MURPHY JUNIOR HIGH SCHOOL1.2 mi · 655
- MILLS POND ELEMENTARY SCHOOL1.3 mi · 338
- SAINT JAMES ELEMENTARY SCHOOL1.4 mi · 461
- NASSAKEAG ELEMENTARY SCHOOL2.0 mi · 551
- SMITHTOWN HIGH SCHOOL EAST2.2 mi · 1,403
- EUGENE AUER MEMORIAL SCHOOL2.3 mi · 308
Frequently asked questions
About WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOLHow large is WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL?
WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL enrolls approximately 525 students in grades PK-06.
What grades does WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL serve?
WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL serves grades PK-06.
What is the student-teacher ratio at WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL?
The student-to-teacher ratio at WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL is approximately 13.1:1 (40 FTE teachers).
What is the racial breakdown of students at WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL?
At WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL, the student body is approximately 55% White, 14% Hispanic, 1% Black, 24% Asian, 5% Two or more.
Is WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL public or private?
WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL is a public K-12 school, overseen by THREE VILLAGE CENTRAL SCHOOL DISTRICT.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.