Enrollment
298
Elementary
DISTRICT 325 · STATE 405
SCHOOL COMMUNITY·ROCKAWAY TOWNSHIP SCHOOL DISTRICT·NCES 341413004516
Dennis B O'Brien Elementary School
16 MINERAL SPRING DRIVE, DOVER, NJ 07801 · (973) 361-7330 · Morris County
GRADES PK–05ELEMENTARY21-SUBURBREGULAR SCHOOL298 STUDENTS
B-
allk12 Grade
Scored higher than 46% of New Jersey public elementary schools
- BTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- CBeats 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 Jersey public elementary schools
Student : Teacher
9.4:1
32 FTE teachers
DISTRICT 9.6:1 · STATE 11.4:1
Free / Reduced Lunch
26%
76 students
DISTRICT 20% · STATE 41%
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 |
|---|---|---|
| Kindergarten | 58 | 19% |
| Grade 1 | 42 | 14% |
| Grade 2 | 60 | 20% |
| Grade 3 | 40 | 13% |
| Grade 4 | 35 | 12% |
| Grade 5 | 63 | 21% |
This year's kindergarten class (58) is 8% smaller than its 5th grade class (63).
Student demographics
72%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 61% · STATE 71% · 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
School pathway
Students here typically continue to
Dennis B O'Brien Elementary School→Copeland Middle School
Based on grade levels within Rockaway Township School District. Attendance zones can vary; confirm enrollment with the district.
QUIET COMMUNITY
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START A DISCUSSIONTest scores
NJSLA 2024-25 . % Meeting or Exceeding ExpectationsEnglish Language Arts
63.2%
NJ avg 53.1% . +6.4pp since 2023
Math
51.4%
NJ avg 41.6% . +0.5pp since 2023
What this means: On the NJSLA, New Jersey's statewide test, about 63 of every 100 students at this school read and write at grade level and about 51 of 100 do math at grade level. Across all New Jersey schools, those numbers are about 53 and 42. Reading and writing scores are up about 6 points since 2023, while math scores have held steady.
NJSLA results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 63.2% | 51.4% |
| 2023-24 | 56.8% | 50.9% |
% Meeting or Exceeding Expectations, all students and all tested grades.
Source: NJSLA. 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
49.5%
composite math + reading, all grades
Predicted
52.2%
based on NJ schools with similar FRL share
Beats by
-2.7pp
below demographic expectation
What this means: About 49% of students here test proficient in math and reading, compared with the roughly 52% typical for New Jersey 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 Jersey'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 Dennis B O'Brien Elementary School
Dennis B O'Brien Elementary School's state test result (49.5% proficient) is higher than 1 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Dennis B O'Brien Elementary School this school | 298 | 25.5% | 49.5% |
| John F Kennedy Elementary School SOUTH PLAINFIELD | 256 | 27.0% | 46.3% |
| Thomas Paine Elementary School CHERRY HILL | 342 | 27.2% | 50.8% |
| Horace Mann Elementary School CHERRY HILL | 287 | 19.9% | 54.3% |
| Thomas G. Connors Elementary School HOBOKEN | 353 | 31.7% | 64.3% |
| Westmoreland Elementary School FAIR LAWN | 359 | 25.1% | 73.7% |
Matched among New Jersey 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 Dennis B O'Brien Elementary School ranks
Among elementary schools| Measure | This school | In New Jersey | In Morris County |
|---|---|---|---|
| State test proficiency ranked highest first | 49.5% | #532 of 1,290 | #62 of 76 |
| Math proficiency ranked highest first | 51.4% | #566 of 1,319 ▼ 37 | #61 of 77 ▼ 1 |
| Reading proficiency ranked highest first | 63.2% | #421 of 1,319 ▲ 111 | #53 of 77 ▲ 7 |
| Enrollment ranked largest first | 298 | #1,115 of 1,562 | #60 of 92 |
| Students per teacher ranked fewest first | 9.4:1 | #199 of 1,390 | #13 of 89 |
| Diversity index ranked most diverse first | 71.8% | #94 of 1,392 | #3 of 89 |
| Free and reduced lunch ranked highest share first | 25.5% | #928 of 1,481 | #25 of 90 |
| Enrollment change since 2017-18 ranked steepest decline first | -11.3% | #378 of 798 | #16 of 44 |
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
298
-12 (-4%) vs 2020
+34% since 1990-91, when it was 223
Student : Teacher
9.4:1
was 10.3:1
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 | 298 | 31.8 | 9.4:1 | 26% (76) |
| 2023-24 | 295 | 32.1 | 9.2:1 | 13% (37) |
| 2022-23 | 275 | 31.1 | 8.9:1 | 16% (44) |
| 2020-21 | 310 | 30 | 10.3:1 | 14% (43) |
| 2017-18 | 336 | 29.5 | 11.4:1 | 12% (41) |
| 2015-16 | 339 | 29 | 11.7:1 | 11% (37) |
| 2010-11 | 254 | 20 | 12.7:1 | 8% (21) |
| 2000-01 | 342 | 24 | 14.3:1 | 6% (21) |
| 1990-91 | 223 | 20 | 11.2:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Dennis B O'Brien Elementary School.
Since 2017-18: students down 11% (336 to 298); teachers up 8% (29.5 to 31.8).
About Dennis B O'Brien Elementary School
Federal records list Dennis B O'Brien Elementary School as an elementary school in DOVER, New Jersey. Its enrollment is 298 students, spread over pre-K through 5. Across elementary schools in New Jersey, the average enrollment is about 405.
Besides Dennis B O'Brien Elementary School, Rockaway Township School District runs 5 other schools. The district enrolls 2,425 students.
The largest racial or ethnic group at Dennis B O'Brien Elementary School is White, with 39% of students. Next come 31% Hispanic, 14% Asian, 11% Black, and 5% multiracial. The county population is about 68% White. The diversity index for Dennis B O'Brien Elementary School is 72%. For US public schools as a whole it is 70%.
Dennis B O'Brien Elementary School has 31.8 full-time-equivalent teachers, for a student-to-teacher ratio of about 9.4:1. By comparison, the average for elementary schools in New Jersey is 11.4:1. A common income measure, free or reduced-price lunch eligibility, is 26% at Dennis B O'Brien Elementary School.
Among New Jersey public elementary schools, Dennis B O'Brien Elementary School outscored 46%, which works out to a B- on the allk12 Grade.
Schools in New Jersey with a similar free or reduced-price lunch share are predicted to score about 52.2%. Dennis B O'Brien Elementary School scores 49.5%.
The county, Morris County, is where the school is located. Median household income comes to about $137,326, about 58% of adults have at least a bachelor's degree, and roughly 3% of residents are in poverty. The county has 156 public schools and about 72,239 students.
Of the public schools around it, Dennis B O'Brien Elementary School is closest to Birchwood Elementary School, about 0.8 miles away. There are at least 8 other public schools within five miles. Nearby schools average 41.2% on proficiency, and Dennis B O'Brien Elementary School is above that at 49.5%.
Dennis B O'Brien Elementary School has an NCES locale of Suburb: Large.
The school's student count decreased 4% between the 2020-21 and 2024-25 school years.
People who know Dennis B O'Brien Elementary School can post here about open houses, carpools, and field trips. Teachers and staff are welcome to share updates too.
Morris County at a glance
View full county profilePopulation
514,528
Census ACS
Median income
$137,326
Household, ACS
Bachelor's+
58%
Adults 25+
Poverty rate
3%
Below federal line
Schools in county
156
72,239 students
Quick facts
Related schools
Other schools in Rockaway Township School District
- Copeland Middle SchoolMiddle · 799 students
- Stony Brook Elementary SchoolElementary · 365 students
- Catherine A Dwyer Elementary SchoolElementary · 346 students
- Birchwood Elementary SchoolElementary · 314 students
- Katharine D Malone Elementary SchoolElementary · 303 students
Other schools in DOVER
- Dover High SchoolHigh · 1,167 students
- North Dover Elementary SchoolElementary · 640 students
- Academy Street Elementary SchoolElementary · 509 students
- Dover Middle SchoolMiddle · 481 students
- East Dover Elementary SchoolElementary · 411 students
- Birchwood Elementary SchoolElementary · 314 students
Nearby schools
- Birchwood Elementary School0.8 mi · 314
- Catherine A Dwyer Elementary School0.9 mi · 346
- Dover High School1.1 mi · 1,167
- Stony Brook Elementary School1.3 mi · 365
- North Dover Elementary School1.3 mi · 640
- Copeland Middle School1.3 mi · 799
Frequently asked questions
About Dennis B O'Brien Elementary SchoolHow large is Dennis B O'Brien Elementary School?
Dennis B O'Brien Elementary School enrolls approximately 298 students in grades PK-05.
What age range does Dennis B O'Brien Elementary School serve?
Dennis B O'Brien Elementary School serves students from grade PK through grade 05.
How many teachers does Dennis B O'Brien Elementary School have?
Dennis B O'Brien Elementary School employs 32 FTE teachers, for a student-to-teacher ratio of 9.4:1.
What is the student diversity at Dennis B O'Brien Elementary School?
Student demographics at Dennis B O'Brien Elementary School are roughly 39% White, 31% Hispanic, 11% Black, 14% Asian, 5% Two or more.
What district is Dennis B O'Brien Elementary School in?
Dennis B O'Brien Elementary School is part of Rockaway Township School District.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.