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A+

South Mountain School

PublicElementaryGrades PK–4

2 Southern Slope Drive, Millburn, NJ 07041 · (973) 921-1394 · Part of Millburn Township School District

Millburn Township’s School Grade A better than 94% of New Jersey school districts

Directions
Students
278
Students per teacher
10:1
Free or reduced lunch
3%
Setting
Suburb
Grades
PK–4
The gist

What stands out about South Mountain School

  • Its own letter, A+: reading and math results near the top of New Jersey’s public schools
  • Math proficiency 52 pts above the state
  • Reading / language arts 30 pts above the state
  • Small classes: 10 students per teacher
  • Next stop for Millburn Township kids: Millburn Middle School

On the path

Where Millburn Township kids come from and go next. The whole path →

PK–4South Mountain SchoolYou are here
6–8Millburn Middle Schoolin Millburn

Test scores

2020–21
Math proficiency77%
State average 25.4%
Reading / language arts77%
State average 47.3%

Its own letter, A+, places these results among New Jersey’s 2,144 public schools with results. Source: EDFacts via Urban Institute Education Data Portal (SY2020-21).

Location

Directions ↗

2 Southern Slope Drive, Millburn

Students

Enrollment by grade
Pre-K42
Kindergarten41
Grade 145
Grade 244
Grade 349
Grade 457
Enrollment over time
274’20
288’21
284’22
285’23
278’24

About steady since 2020–21.

Who goes here
Asian 55%White 26%Two or more races 8%Hispanic 6%Black 5%

As reported to NCES, share of students with a reported race or ethnicity.

Parents talk

Questions and answers about South Mountain School from Millburn Township families.

Other schools in Millburn Township School District

The district →
Hartshorn School
Elementary · Grades K–4 · Short Hills
A+
392 students11:1
Deerfield School
Elementary · Grades K–4 · Short Hills
A+
358 students12:1
Wyoming School
Elementary · Grades K–4 · Millburn
A+
346 students13:1
Glenwood School
Elementary · Grades K–4 · Short Hills
A+
315 students13:1
Washington School
Middle · Grades 5 · Millburn
A+
363 students11:1
Millburn Middle School
Middle · Grades 6–8 · Millburn
A+
1,106 students11:1

School facts: U.S. Department of Education (NCES), 2024–2025 school year. Test scores: EDFacts via Urban Institute Education Data Portal (SY2020-21). A school’s letter is our own summary of its reading and math results against New Jersey’s other public schools; Millburn Township’s School Grade is built from its districts’ results. Map: © OpenStreetMap contributors.