Enrollment
772
New Jersey · 2024-25 NCES data
Elementary school (grades K-5) · Plainsboro, NJ
Millstone River School
Federal NCES profile for Millstone River School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 57/100.
2024-25 NCES dataElementary school (grades K-5)NCES 341770006077
👥 S:T ratio 63
🌟 Gifted program 70
🎓 Counselors 23
📋 Attendance 72
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Millstone River School earns 57/100 on the Resource Investment Index, with class sizes smaller than 83% of New Jersey schools.
- #3 of 5
- public schools in Plainsboro · Resource Index
- 57
- Resource Index · Higher
- 9.3:1
- small classes for New Jersey
- 5.2%
- free-lunch eligible
Millstone River School has class sizes smaller than 83% of New Jersey schools. Computed live against every New Jersey school reporting to NCES.
By Resource Investment Index, Millstone River School ranks #3 of 5 public schools in Plainsboro, NJ.
School address
NCES ID 341770006077 Verify on NCES CCD record →
Teachers (FTE)
83.0
Federal CCD staff survey
Students per teacher
9.3:1
vs 11.8:1 New Jersey avg
-21% vs state
Free-lunch eligible
5.2%
vs 29.6% New Jersey avg
-82% vs state
Student-teacher ratio in context
How Millstone River School compares with New Jersey and U.S. medians
What stands out at Millstone River School
Millstone River School is a lower-poverty, mid-sized elementary school in Plainsboro, New Jersey, enrolling 772 students.
Class sizes run a bit leaner than typical: 9.3:1 puts it in the smaller third of New Jersey schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 5.2% of students eligible for free meals.
Enrollment of 772 puts it in the larger third of New Jersey schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 2,501 scored New Jersey schools.
Against 389 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #157.
Its student body is led by Asian (76%) and White (8%) (diversity index 40/100).
Counselor availability sits well past the ASCA benchmark, roughly 386 students sharing each counselor, though short of the most stretched campuses.
11.3% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
West Windsor-Plainsboro Regional School District also operates West Windsor-Plainsboro High School South (1,627 students) and West Windsor-Plainsboro High School North (1,510 students) alongside Millstone River School.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Millstone River School compares
Millstone River School on the metrics families compare, against New Jersey and U.S. means.
| Metric | This school | vs New Jersey | New Jersey avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 9.3:1 | ▼ 21% | 11.8:1 | 15.7:1 |
| Free-lunch eligible | 5.2% | ▼ 82% | 29.6% | 51.7% |
| Enrollment | 772 | top 17% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
9.3:1
Leaner classes than 92% of US schools, among the more generously staffed nationally.
772
Bigger than 84% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
5.2%
free-lunch eligible
- 82% below the New Jersey average of 29.6%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
9.3:1
students per teacher
- 21% below state mean
Top 17% in New Jersey - lower ratio than 83% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
11.3%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
Funding equity
$23,204
per pupil, district-wide
- below New Jersey avg of $24,984
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors2.0 FTE
Per 386 students, the combined health-and-guidance staffing load for this school.
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.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
Asian 76.4%
White 8.2%
Hispanic or Latino 5.2%
African American 5.1%
Two or More 4.4%
American Indian / Alaska Native 0.8%
Largest group: Asian at 76.4% of enrollment.
Student-body diversity index 40.2/100
Simpson diversity index - at 40.2, Millstone River School is less mixed than the New Jersey school average of 51.2.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for West Windsor-Plainsboro Regional School District, which includes Millstone River School.
$23,204
Per student
-7%
vs New Jersey
Avg $24,984
+40%
vs U.S.
Avg $16,593
Revenue mix
Local 72.7%
State 23.6%
Federal 3.7%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Millstone River School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| West Windsor-Plainsboro High School South | Larger | Similar economic need | Higher S:T ratio |
| West Windsor-Plainsboro High School North | Larger | Similar economic need | Higher S:T ratio |
| Thomas R Grover Middle School | Larger | Similar economic need | Higher S:T ratio |
| Community Middle School | Larger | Similar economic need | Similar S:T ratio |
| Maurice Hawk Elementary School | Similar size | Similar economic need | Higher S:T ratio |
Comparisons are relative to Millstone River School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,627
- Students per teacher
- 13.2:1
- Resource Index
- 68/100
- Enrollment
- 1,510
- Students per teacher
- 12.5:1
- Resource Index
- 68/100
- Enrollment
- 1,183
- Students per teacher
- 11.9:1
- Resource Index
- 62/100
- Enrollment
- 1,029
- Students per teacher
- 10:1
- Resource Index
- 66/100
- Enrollment
- 723
- Students per teacher
- 12.5:1
- Resource Index
- 49/100
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of New Jersey, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~772 students)
Similar student-teacher ratio (~9.3:1)
Next steps
Verify locally before acting on Millstone River School's federal record.
- Compare Millstone River School against another school. Compare schools
- West Windsor-Plainsboro Regional School District's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Millstone River School
How many students attend Millstone River School?
Millstone River School has 772 students enrolled. It is an elementary school in Plainsboro, NJ.
What is the student-teacher ratio at Millstone River School?
The student-teacher ratio at Millstone River School is 9.3:1, which is 21% lower than the New Jersey average of 11.8:1 and 41% 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 Millstone River School?
5.2% of students at Millstone River School are eligible for free lunch, compared to the New Jersey average of 29.6%.
What is the racial and ethnic makeup of Millstone River School?
The largest demographic group at Millstone River School is Asian at 76.4% of enrollment, in Plainsboro, NJ.
What is the Resource Investment Index for Millstone River School?
Millstone River School has a Resource Investment Index of 57/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Millstone River School rank among public schools in Plainsboro?
By Resource Investment Index, Millstone River School ranks #3 of 5 public schools in Plainsboro, 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 Plainsboro on the city page.
Is Millstone River School a good school?
Millstone River School earns 57/100 on the Resource Investment Index, with class sizes smaller than 83% of New Jersey schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in West Windsor-Plainsboro Regional School District?
Besides Millstone River School, West Windsor-Plainsboro Regional School District also operates West Windsor-Plainsboro High School South (1,627 students), West Windsor-Plainsboro High School North (1,510 students), and Thomas R Grover Middle School (1,183 students). See the West Windsor-Plainsboro Regional School District district page for the complete list.
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Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.