Average
#1140 of 2,466 schools in NJ
Top 46% in state
South Mountain School
Elementary School · Millburn Township School District · Millburn, NJ
A Millburn Township School District elementary school where students score 17 points above what's typical for similar communities.
2 SOUTHERN SLOPE DRIVE, Millburn, NJ 07041
- Math 90% vs NJ 48% (2025)
- Reading 77% vs NJ 49% (2025)
- 9.8:1 student-teacher ratio
Academics
Full Profile · 3/3 metricsView breakdown
View breakdown
View breakdown
Students at South Mountain School score 84% proficient, which is above what's typical for similar communities (expected: 67%).
2025 NJSLA proficiency
Most recent published year. School vs. NJ average.
Trend
↑ RecoveringProficiency declined earlier in the 17-year record (2009–2025), then recovered 7 points since 2021, reaching 84% in 2025.
Show all 16 years
Multi-year averages used by the rating model: math 85% (multi-year average, 2009-2025) · reading/ELA 82% (multi-year average, 2009-2025)
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Based on 36 test records from NJ state assessments and EdFacts (NCES).
Equity & diversity
Shown separately, not included in the overall scoreFree/reduced lunch
2.1%
Students qualifying for federal meal assistance
How we rate schools
A clear 1–10 score built from public data — growth, academics, and learning environment. No hidden criteria, no pay-to-play.
See how we rateThe neighborhood
Where South Mountain School sits, and what the surrounding area looks like.
Nearby same-level schools are colored by their score. Pins are locations, not attendance boundaries. Open the New York map →
Getting around & local context
- Walk 66Somewhat Walkable
- Bike 51Bikeable
- County Safety: Low18/100K
Powered by
FBI Uniform Crime Reporting · 2024 · county context, not school-level safety or attendance eligibility. Source details
Source period: 2024. A newer release may be available.
Area profileU.S. Census ACS 5-year estimates (ACS 2019–2023 5-year estimates)
Median income
$220,923
Median home value
$935,900
Median rent
$1,969/mo
College educated
81.3%
Homeownership
68.1%
Poverty rate
3.9%
ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 07041; this is area context, not an attendance boundary.
Programs & students
Programs & Offerings
Compare nearby
Nearby same-level schools
4 from a 5-mile search; district fallback available
| School | Score | Grades | Distance | Enrollment | Compare |
|---|---|---|---|---|---|
| Wyoming SchoolEnrollment path unverified | 7.6 | K–4 | 0.7 mi | 334 | Compare → |
| Springfield Genius AcademyPrivate · tuition | Not rated | PK–1 | 0.8 mi | 10 | Compare → |
| The Children's AcademyPrivate · tuition | Not rated | PK–K | 0.8 mi | 2 | Compare → |
| James Caldwell Elementary SchoolEnrollment path unverified | 7.0 | 3–5 | 1.1 mi | 233 | Compare → |
Distance is proximity only; it is not attendance eligibility.
Enrollment path unverified: Potential public school; its attendance or application path has not been classified.
Private · tuition: Potential private option; tuition and admission requirements have not been verified.
Millburn Township School District
- Schools in district
- 8
- Rank in district
- #8 of 8
- District spending per student
- $25,654NCES F-33 · FY 2023 · This annual source is three years behind the current year.
- District child poverty rate
- 2.1%Census SAIPE · 2024
South Mountain School is listed in Millburn Township School District; a district label does not verify attendance for an address.
About South Mountain School
South Mountain School is a public elementary school in Millburn, NJ, part of Millburn Township School District, serving approximately 285 students in grades Pre-K-4th with a 9.8:1 student-teacher ratio. It holds a MySchoolScout rating of 6.6 out of 10 and ranks #1,140 of 2,466 schools in NJ. State assessment records show 85% math proficiency (multi-year average, 2009-2025) and 82% reading/ELA proficiency (multi-year average, 2009-2025).
What's said publicly about South Mountain School
Synthesized from public, attributable sources. Updated May 2026.
Sources (1)
Frequently asked questions
Common questions about South Mountain School
What grades does South Mountain School serve?
South Mountain School serves students in grades Pre-K through 4th.
How many students attend South Mountain School?
South Mountain School has an enrollment of approximately 285 students.
What is the student-teacher ratio at South Mountain School?
The student-teacher ratio at South Mountain School is 9.8:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does South Mountain School rank in NJ?
South Mountain School ranks #1,140 of 2,466 schools in NJ.
What is South Mountain School's MySchoolScout rating?
South Mountain School has a current MySchoolScout rating of 6.6 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at South Mountain School?
Based on loaded state assessment records, South Mountain School has 85% math proficiency (multi-year average, 2009-2025) and 82% reading/ELA proficiency (multi-year average, 2009-2025).
Is South Mountain School a charter school?
No, South Mountain School is not a charter school. It is a traditional public school operated by the local school district.
Is South Mountain School a Title I school?
No, South Mountain School is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for South Mountain School?
2.1% of students at South Mountain School qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
School factsNCES Common Core of Data (CCD) (SY 2023–24)
- Grades
- Pre-K – 4th
- Enrollment
- 285
- Student-Teacher Ratio
- 9.8:1
- Teachers (FTE)
- 29
- Type
- regular
- Setting
- Large Suburb
- County
- Essex County
- Chronic Absenteeism (SY 2022-23)
- 8.8%
- Phone
- (973) 921-1394
- Area population (ZIP 07041)
- 7,610
- Area average commute
- 41.6 min
- Area median age
- 39
Official sources & links
About this school's data
Every number on this page comes from a published source with a stated period. Where a source is partial, aging, or describes a surrounding area rather than the school, that limitation is named below.
- School directory (enrollment, grades, staff, contact)
- NCES Common Core of Data (CCD) · SY 2023–24 · Medium confidence
- Source period: SY 2023–24. A newer release may be available.
- MySchoolScout rating and rank
- MySchoolScout ranking model · Low confidence
- Vintage not available. Do not use this measure alone.
- Derived as a weighted blend of the component scores shown in Academics from state assessment, EdFacts growth, and NCES resource records.
- Math proficiency
- State department of education · 2025 NJSLA · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: 2025 NJSLA. A newer release may be available.
- Derived from source records rather than read directly from one field.
- Reading/ELA proficiency
- State department of education · 2025 NJSLA · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: 2025 NJSLA. A newer release may be available.
- Derived from source records rather than read directly from one field.
- Student progress (growth)
- State assessments · Mixed source periods · Low confidence
- Vintage not available. Do not use this measure alone.
- Available for part of the eligible units; results may not represent the full area.
- Derived as the fitted year-over-year slope of proficiency from multi-year assessment records.
- Neighborhood (income, housing, education)
- U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates · Low confidence
- Older source: ACS 2019–2023 5-year estimates. Use as historical context.
- Reported for the ZCTA for ZIP 07041; this does not measure the attendance area.
- Programs (AP/IB, athletics, gifted)
- CRDC via Urban Institute · SY 2021–22 · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: SY 2021–22. A newer release may be available.
Evidence periods: Rating mixed/unknown input periods; assessments multi-year average, 2009-2025; directory SY 2023–24
Related reading
Get school insights in your inbox
New rankings, best-schools lists, and parent guides — delivered free. No spam, unsubscribe anytime.
We respect your privacy. Unsubscribe at any time.