Mountain Park School
School pathway
Test scores
NJSLA 2024-25 . % Meeting or Exceeding ExpectationsWhat this means: On the NJSLA, New Jersey's statewide test, about 64 of every 100 students at this school read and write at grade level and about 72 of 100 do math at grade level. Across all New Jersey schools, those numbers are about 53 and 42. Reading and writing scores are down about 7 points since 2023, while math scores are down about 2 points.
BeatsExpectations
Demographically-adjusted score · methodologyWhat this means: About 68% of students here test proficient in math and reading, compared with the roughly 64% 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%.
7-year change
SY 2017-18 vs SY 2024-25About Mountain Park School
Mountain Park School, a small K-5 school in BERKELEY HTS, New Jersey, run under Berkeley Heights School District, serves 224 students, covering grades 3 through 5. That puts it 45% below the typical public school in New Jersey, which averages around 405 students.
Berkeley Heights School District runs 6 schools in total, collectively educating 2,340 students. Mountain Park School is one of those campuses.
For racial and ethnic makeup, Mountain Park School reports that the largest single group is White at 50%, but no single group is in the majority; the rest consists of 25% Asian, 16% Hispanic, 8% multiracial. The wider county runs roughly 39% White, putting the school's mix considerably more White than the area baseline.
Looking at the economic backdrop, Staff filings list 24 full-time-equivalent teachers, which works out to roughly 9.4:1 students per teacher. That figure is tighter than the state norm's 11.4:1 average. An estimated 4% of students are eligible for free or reduced-price lunch, often used as a Title I proxy. By comparison, Union County runs at roughly 52%, so the school's eligibility rate is somewhat below the surrounding baseline.
On a demographically-adjusted basis, Mountain Park School sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 63.7%; this one delivers 67.8%.
Across the wider county, ACS estimates for Union County put median household earnings sit near $103,202, about 39% of the adult population holds a bachelor's degree or above, and census figures put the poverty rate at about 7%. Mountain Park School is one of 180 public schools in Union County (combined enrollment of about 99,046 students).
The closest other public school is Columbia Middle School, roughly 0.8 miles away. 8 of the 8 nearest public schools sit inside a five-mile radius. On composite proficiency, Mountain Park School comes 2nd of 6 in the immediate cluster, ahead of the nearby-schools average of 64.7%.
The campus sits in a commuter-belt setting.
Five-year trend. Mountain Park School's enrollment has held roughly steady since 2018, when it stood at 228 (now 224). The White share of enrollment edged down from 67% to 50% over that span. Class-load math has tightened: from 11.0:1 in 2018 to 9.4:1 in 2025.
In the discussion threads here, recent activity here tends to focus on school events, parent volunteer needs, and clubs. The community welcomes input from current and former families.
Union County at a glance
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