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Deerfield Elementary School
Test scores
NJSLA 2024-25 . % Meeting or Exceeding ExpectationsBeatsExpectations
Demographically-adjusted score · methodology7-year change
SY 2017-18 vs SY 2024-25About Deerfield Elementary School
Deerfield Elementary School, a tight-knit 6-8 campus in MOUNTAINSIDE, New Jersey, run under Mountainside School District, enrolls 483 students, covering grades 3 through 8.
Deerfield Elementary School is one of 2 schools operated by Mountainside School District, a district that hosts 748 students overall.
In terms of who attends, Deerfield Elementary School reports that the largest single group is White, at 69% of enrollment; the rest reads as 13% Hispanic, 9% Asian, 7% multiracial. By comparison, Union County as a whole is about 39% White, so the school skews visibly more White than its surroundings.
In terms of school funding signals, The school reports having 45 full-time-equivalent teachers, for a student-teacher ratio near 10.7:1. The state averages about 10.9:1, putting this campus right in line with peers. Around 3% of the student body qualifies for free or reduced-price meals, which schools and policymakers use as a rough income-mix signal. Set against Union County (around 52%), the school's rate is meaningfully below typical.
On a residual basis (actual vs predicted given the student mix), Deerfield Elementary School sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 64.6%; this one delivers 73.6%.
In the broader community, 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%. In all, Union County runs 180 public schools (combined enrollment of about 99,046 students), of which Deerfield Elementary School is one.
Nearest neighbor: Crossroads School, around 1.0 miles off. Counting just inside five miles, 8 other public schools cluster around Deerfield Elementary School. On composite proficiency, Deerfield Elementary School comes 3rd of 6 in the immediate cluster, above the nearby-schools average of 67.6%.
The school occupies a suburban site.
Five-year trend. Deerfield Elementary School's enrollment has showed little movement since 2018, when it stood at 490 (now 483). The White share of enrollment declined from 83% to 69% over that span.
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Union County at a glance
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