- Enrollment
- 1,380
- Students per teacher
- 10.7:1
- Resource Index
- 64/100
Other / mixed grade configuration · Millburn, NJ
South Mountain School
Federal NCES profile for South Mountain School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 73/100.
2024-25 NCES dataOther / mixed grade configurationNCES 341020000230
👥 S:T ratio 62
🌟 Gifted program 70
📋 Attendance 88
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
South Mountain School earns 73/100 on the Resource Investment Index, with class sizes smaller than 80% of New Jersey schools.
- #1 of 4
- public schools in Millburn · Resource Index
- 73
- Resource Index · Higher
- 9.6:1
- small classes for New Jersey
- 1.4%
- free-lunch eligible
South Mountain School has class sizes smaller than 80% of New Jersey schools. Computed live against every New Jersey school reporting to NCES.
By Resource Investment Index, South Mountain School ranks #1 of 4 public schools in Millburn, NJ.
School address
District: Millburn Township School District · New Jersey
NCES ID 341020000230 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+1 students YoY
South Mountain School held near 285 students from 2022-23 to 2023-24 (+1 headcount).
Teacher FTE held 29.7 → 29.8 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+1 students YoY 341020000230 · Millburn, NJ Other · SMALL · TRAD
278 enr · 9.6:1 · 1.4% lunch · RII 73
Nearest enrollment peer: Millburn High School (1,380 students)
South Mountain School held near 285 students from 2022-23 to 2023-24 (+1 headcount). Teacher FTE held 29.7 → 29.8 across the same CCD years. Read with this school → · District book → · New Jersey schools → · Find another →
South Mountain School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Millburn High
Millburn High School
1,380 students
- Millburn Middl
Millburn Middle School
1,106 students
- Hartshorn Scho 392
Hartshorn School
392 students
- Washington Sch 363
Washington School
363 students
- Deerfield Scho 358
Deerfield School
358 students
- This school 278
South Mountain School
278 students
What this shows South Mountain School reports 278 students on the CCD universe file.
How South Mountain School compares
South Mountain School held steady on CCD headcount: ratios and free-lunch share vs New Jersey and U.S. means.
| Metric | This school | vs New Jersey | New Jersey avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 9.6:1 | ▼ 19% | 11.8:1 | 15.7:1 |
| Free-lunch eligible | 1.4% | ▼ 95% | 29.6% | 51.7% |
| Enrollment | 278 | top 79% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
9.6:1
Leaner classes than 91% of US schools, among the more generously staffed nationally.
278
Bigger than 29% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
1.4%
free-lunch eligible
- 95% below the New Jersey average of 29.6%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
9.6:1
students per teacher
- 19% below state mean
Top 20% in New Jersey - lower ratio than 80% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
5.0%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
Funding equity
$25,435
per pupil, district-wide
- below New Jersey avg of $26,225
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Asian 55.0%
White 26.3%
Two or More 8.3%
Hispanic or Latino 5.8%
African American 4.7%
Largest group: Asian at 55.0% of enrollment.
Student-body diversity index 61.6/100
Simpson diversity index - at 61.6, South Mountain School is more mixed than the New Jersey school average of 51.2.
Programs
Gifted & talented Yes
District finance for Millburn Township School District reports $25,435 per pupil (NCES F-33) - open the district page for the full revenue mix.
How South Mountain School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Millburn High School | Larger | Similar economic need | Similar S:T ratio |
| Millburn Middle School | Larger | Similar economic need | Similar S:T ratio |
| Hartshorn School | Larger | Similar economic need | Higher S:T ratio |
| Washington School | Larger | Similar economic need | Higher S:T ratio |
| Deerfield School | Larger | No free-lunch data | Higher S:T ratio |
Comparisons are relative to South Mountain School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,106
- Students per teacher
- 10.6:1
- Resource Index
- 59/100
- Enrollment
- 392
- Students per teacher
- 11.5:1
- Resource Index
- 69/100
- Enrollment
- 363
- Students per teacher
- 11.3:1
- Resource Index
- 59/100
- Enrollment
- 358
- Students per teacher
- 11.9:1
- Resource Index
- 56/100
Nationwide other schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~278 students)
Frequently asked questions about South Mountain School
How many students attend South Mountain School?
South Mountain School has 278 students enrolled. It is a public school in Millburn, NJ. CCD year-over-year: 284 (2022-23) → 285 (2023-24), nearly flat (+1).
What is the student-teacher ratio at South Mountain School?
The student-teacher ratio at South Mountain School is 9.6:1, which is 19% lower than the New Jersey average of 11.8:1 and 39% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at South Mountain School?
1.4% of students at South Mountain School are eligible for free lunch, compared to the New Jersey average of 29.6%.
What is the racial and ethnic makeup of South Mountain School?
The largest demographic group at South Mountain School is Asian at 55.0% of enrollment, in Millburn, NJ. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 61.6/100.
What is the Resource Investment Index for South Mountain School?
South Mountain School has a Resource Investment Index of 73/100 (higher reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, gifted-program reporting, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does South Mountain School rank among public schools in Millburn?
By Resource Investment Index, South Mountain School ranks #1 of 4 public schools in Millburn, NJ. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Millburn on the city page.
What other schools are in Millburn Township School District?
Besides South Mountain School, Millburn Township School District also operates Millburn High School (1,380 students), Millburn Middle School (1,106 students), and Hartshorn School (392 students). See the Millburn Township School District district page for the complete list.