Enrollment
288
Elementary
DISTRICT 389 · STATE 405
SCHOOL COMMUNITY·WOODBRIDGE TOWNSHIP SCHOOL DISTRICT·NCES 341812003688
Robert Mascenik Elementary School
300 BENJAMIN AVENUE, ISELIN, NJ 08830 · (732) 602-8526 · Middlesex County
GRADES KG–05ELEMENTARY21-SUBURBREGULAR SCHOOL288 STUDENTS
B-
allk12 Grade
Scored higher than 50% 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.
- C+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 Jersey public elementary schools
Student : Teacher
15.2:1
19 FTE teachers
DISTRICT 12.1:1 · STATE 11.4:1
Free / Reduced Lunch
27%
78 students
DISTRICT 43% · 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 | 40 | 14% |
| Grade 1 | 50 | 17% |
| Grade 2 | 57 | 20% |
| Grade 3 | 45 | 16% |
| Grade 4 | 58 | 20% |
| Grade 5 | 38 | 13% |
This year's kindergarten class (40) is 5% larger than its 5th grade class (38).
Student demographics
68%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 74% · 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
QUIET COMMUNITY
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START A DISCUSSIONTest scores
NJSLA 2024-25 . % Meeting or Exceeding ExpectationsEnglish Language Arts
50.0%
NJ avg 53.1% . +4.1pp since 2023
Math
56.5%
NJ avg 41.6% . +1.4pp since 2023
What this means: On the NJSLA, New Jersey's statewide test, about 50 of every 100 students at this school read and write at grade level and about 57 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 4 points since 2023, while math scores are up about 1 points.
NJSLA results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 50.0% | 56.5% |
| 2023-24 | 45.9% | 55.1% |
% 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
49.9%
composite math + reading, all grades
Predicted
51.3%
based on NJ schools with similar FRL share
Beats by
-1.5pp
below demographic expectation
What this means: About 50% of students here test proficient in math and reading, compared with the roughly 51% 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 Robert Mascenik Elementary School
Robert Mascenik Elementary School's state test result (49.9% proficient) is higher than 0 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Robert Mascenik Elementary School this school | 288 | 27.1% | 49.9% |
| Troy Hills Elementary School PARSIPPANY | 290 | 21.7% | 69.5% |
| Intervale Elementary School Boonton | 287 | 18.8% | 64.8% |
| Irwin Elementary School EAST BRUNSWICK | 305 | 30.5% | 73.6% |
| Rockaway Meadow Elementary School PARSIPPANY | 257 | 29.2% | 62.6% |
| Eleanor Van Gelder EDGEWATER | 384 | 20.3% | 57.8% |
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 Robert Mascenik Elementary School ranks
Among elementary schools| Measure | This school | In New Jersey | In Middlesex County |
|---|---|---|---|
| State test proficiency ranked highest first | 49.9% | #526 of 1,290 | #52 of 111 |
| Math proficiency ranked highest first | 56.5% | #471 of 1,319 ▼ 6 | #44 of 111 ▲ 1 |
| Reading proficiency ranked highest first | 50.0% | #714 of 1,319 ▲ 55 | #59 of 111 ▲ 3 |
| Enrollment ranked largest first | 288 | #1,155 of 1,562 | #105 of 130 |
| Students per teacher ranked fewest first | 15.2:1 | #1,307 of 1,390 | #114 of 120 |
| Diversity index ranked most diverse first | 68.4% | #209 of 1,392 | #46 of 121 |
| Free and reduced lunch ranked highest share first | 27.1% | #905 of 1,481 | #86 of 128 |
| Enrollment change since 2017-18 ranked steepest decline first | -6.8% | #548 of 798 | #70 of 84 |
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
288
-25 (-8%) vs 2020
+4% since 1990-91, when it was 277
Student : Teacher
15.2:1
was 14.2:1
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 | 288 | 19 | 15.2:1 | 27% (78) |
| 2023-24 | 306 | 21 | 14.6:1 | 25% (77) |
| 2022-23 | 321 | 23 | 14.0:1 | 19% (61) |
| 2020-21 | 313 | 22 | 14.2:1 | 17% (52) |
| 2017-18 | 309 | 20 | 15.4:1 | 15% (46) |
| 2015-16 | 286 | 17 | 16.8:1 | 16% (45) |
| 2010-11 | 272 | 14 | 19.4:1 | 17% (46) |
| 2000-01 | 387 | 18 | 21.5:1 | 12% (47) |
| 1990-91 | 277 | 14 | 19.8:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Robert Mascenik Elementary School.
Since 2017-18: students down 7% (309 to 288); teachers down 5% (20 to 19).
About Robert Mascenik Elementary School
Robert Mascenik Elementary School is a small elementary school located in ISELIN, New Jersey. Classes run from kindergarten through 5, and the school has 288 students. Against the 405-student average for elementary schools in New Jersey, enrollment here is 29% lower.
Robert Mascenik Elementary School is part of Woodbridge Township School District, where 24 schools serve 13,869 students.
Federal enrollment data show Asian students as the largest group at Robert Mascenik Elementary School, at 43%. Other groups make up 29% White, 20% Hispanic, 5% Black, and 3% multiracial. County-wide, 26% of Middlesex County residents are Asian. The school's diversity index is 68%, meaning two students picked at random have a 68% chance of belonging to different racial or ethnic groups.
The count of teachers at Robert Mascenik Elementary School is 19 full-time equivalents, for a ratio of 15.2:1. That is 3.7 students per teacher above the 11.4:1 average for elementary schools in New Jersey. Around 27% of the school's students qualify for free or reduced-price meals. That is lower than the 42% average for public schools in Middlesex County.
The allk12 Grade for Robert Mascenik Elementary School is B-. Compared with New Jersey public elementary schools, the school scored higher than 50% on a mix of test scores, poverty-adjusted results, and recent trend.
A school with Robert Mascenik Elementary School's lunch-eligibility share in New Jersey is predicted to score 51.3%. Robert Mascenik Elementary School scores 49.9%, 1.5 points below that line.
In Middlesex County (population about 871,290), the median household income is $111,549, roughly 46% of adults have a four-year degree or more, and the share of residents below the poverty line is 6%. There are 214 public schools in Middlesex County, enrolling about 129,255 students in all.
The shortest distance from Robert Mascenik Elementary School to another public school is about 0.4 miles, to Indiana Avenue Elementary School. Counting only straight-line distance, at least 8 other public schools are within five miles. Among the 8 closest schools with test data, this one included, Robert Mascenik Elementary School ranks 4th on average proficiency.
Locale: Suburb: Large. In NCES terms, the school is in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
Enrollment is down 8% from 2020-21, when Robert Mascenik Elementary School had 313 students, to 2024-25, when it had 288.
Community posts for Robert Mascenik Elementary School can cover school safety, transportation, and start times. Questions from prospective families are welcome too.
Middlesex County at a glance
View full county profilePopulation
871,290
Census ACS
Median income
$111,549
Household, ACS
Bachelor's+
46%
Adults 25+
Poverty rate
6%
Below federal line
Schools in county
214
129,255 students
Quick facts
Related schools
Other schools in Woodbridge Township School District
- Woodbridge High SchoolHigh · 1,681 students
- John F. Kennedy Memorial High SchoolHigh · 1,405 students
- Colonia High SchoolHigh · 1,354 students
- Iselin Middle SchoolMiddle · 794 students
- Lafayette Estates Elementary SchoolElementary · 705 students
- Fords Middle SchoolMiddle · 645 students
Other schools in ISELIN
- John F. Kennedy Memorial High SchoolHigh · 1,405 students
- Iselin Middle SchoolMiddle · 794 students
- Indiana Avenue Elementary SchoolElementary · 485 students
- Oak Tree Road Elementary SchoolElementary · 425 students
- Kennedy Park Elementary SchoolElementary · 256 students
Nearby schools
- Indiana Avenue Elementary School0.4 mi · 485
- Oak Tree Road Elementary School0.4 mi · 425
- Kennedy Park Elementary School0.5 mi · 256
- Iselin Middle School0.6 mi · 794
- John F. Kennedy Memorial High School0.6 mi · 1,405
- Colonia High School1.2 mi · 1,354
Frequently asked questions
About Robert Mascenik Elementary SchoolHow many students attend Robert Mascenik Elementary School?
Robert Mascenik Elementary School enrolls approximately 288 students in grades KG-05.
What grades does Robert Mascenik Elementary School serve?
Robert Mascenik Elementary School serves grades KG-05.
How many teachers does Robert Mascenik Elementary School have?
Robert Mascenik Elementary School employs 19 FTE teachers, for a student-to-teacher ratio of 15.2:1.
How diverse is Robert Mascenik Elementary School?
Robert Mascenik Elementary School reports a student body of 29% White, 20% Hispanic, 5% Black, 43% Asian, 3% Two or more.
Who oversees Robert Mascenik Elementary School?
Robert Mascenik Elementary School is overseen by Woodbridge Township School District in Middlesex County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.