Enrollment
457
Connecticut · 2024-25 NCES data
Elementary school (grades K-5) · Norwalk, CT
Jefferson Marine Science Elementary School
Federal NCES profile for Jefferson Marine Science Elementary School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 46/100.
2024-25 NCES dataElementary school (grades K-5)NCES 090309000648
👥 S:T ratio 48
🌟 Gifted program 70
📋 Attendance 21
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Jefferson Marine Science Elementary School earns 46/100 on the Resource Investment Index, with class sizes larger than 76% of Connecticut schools.
- #6 of 7
- elementary schools in Norwalk · Resource Index
- 46
- Resource Index · Typical
- 13.1:1
- large classes for Connecticut
- 55.8%
- free-lunch eligible
Jefferson Marine Science Elementary School has class sizes larger than 76% of Connecticut schools. Computed live against every Connecticut school reporting to NCES.
By Resource Investment Index, Jefferson Marine Science Elementary School ranks #6 of 7 elementary schools in Norwalk, CT.
School address
District: Norwalk School District · Connecticut
NCES ID 090309000648 Verify on NCES CCD record →
Teachers (FTE)
35.0
Federal CCD staff survey
Students per teacher
13.1:1
vs 12.1:1 Connecticut avg
+8% vs state
Free-lunch eligible
55.8%
vs 36.4% Connecticut avg
+53% vs state
Student-teacher ratio in context
How Jefferson Marine Science Elementary School compares with Connecticut and U.S. medians
What stands out at Jefferson Marine Science Elementary School
Jefferson Marine Science Elementary School is a higher-need, mid-sized elementary school in Norwalk, Connecticut, enrolling 457 students.
Class loads run somewhat heavier than typical: 13.1:1 puts it in the larger third of Connecticut schools by student-teacher ratio.
Economic need runs somewhat above the state's typical profile, with 55.8% of students eligible for free meals.
With 457 students, its enrollment sits close to the Connecticut median campus size.
Its Resource Investment Index sits near the middle of the pack among 1,003 scored Connecticut schools.
Against 179 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #43.
Its student body is led by Hispanic or Latino (67%) and African American (13%) (diversity index 52/100).
Chronic absenteeism is elevated: 31.7% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Norwalk's elementary schools, it stands alongside Tracey Magnet School (434 students): Jefferson Marine Science Elementary School is larger than that campus by headcount and runs heavier classes (13.1:1 vs 12.4:1).
Norwalk School District also operates Brien Mcmahon High School (1,739 students) and Norwalk High School (1,494 students) alongside Jefferson Marine Science Elementary 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 Jefferson Marine Science Elementary School compares
Jefferson Marine Science Elementary School on the metrics families compare, against Connecticut and U.S. means.
| Metric | This school | vs Connecticut | Connecticut avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 13.1:1 | ▲ 8% | 12.1:1 | 15.7:1 |
| Free-lunch eligible | 55.8% | ▲ 53% | 36.4% | 51.7% |
| Enrollment | 457 | top 40% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.1:1
Leaner classes than 66% of US schools, among the more generously staffed nationally.
457
Bigger than 56% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
55.8%
free-lunch eligible
- 53% above the Connecticut average of 36.4%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
13.1:1
students per teacher
- 8% above state mean
Top 76% in Connecticut - lower ratio than 24% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
31.7%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$25,610
per pupil, district-wide
- above Connecticut avg of $23,870
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.
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
Hispanic or Latino 67.0%
African American 13.1%
White 7.4%
Asian 7.4%
Two or More 4.2%
American Indian / Alaska Native 0.9%
Largest group: Hispanic or Latino at 67.0% of enrollment.
Student-body diversity index 52.1/100
Simpson diversity index - at 52.1, Jefferson Marine Science Elementary School is about as mixed as the Connecticut school average of 50.5.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Norwalk School District, which includes Jefferson Marine Science Elementary School.
$25,610
Per student
+7%
vs Connecticut
Avg $23,870
+54%
vs U.S.
Avg $16,593
Revenue mix
Local 69.3%
State 23.3%
Federal 7.4%
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 Jefferson Marine Science Elementary School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Brien Mcmahon High School | Larger | Lower economic need | Higher S:T ratio |
| Norwalk High School | Larger | Lower economic need | Similar S:T ratio |
| West Rocks Middle School | Larger | Lower economic need | Lower S:T ratio |
| Ponus Ridge Steam Academy | Larger | Similar economic need | Lower S:T ratio |
| Nathan Hale Middle School | Similar size | Lower economic need | Lower S:T ratio |
Comparisons are relative to Jefferson Marine Science Elementary School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,739
- Students per teacher
- 14.6:1
- Resource Index
- 42/100
- Enrollment
- 1,494
- Students per teacher
- 13.3:1
- Resource Index
- 32/100
- Enrollment
- 657
- Students per teacher
- 10.6:1
- Resource Index
- 59/100
- Enrollment
- 637
- Students per teacher
- 10.8:1
- Resource Index
- 49/100
- Enrollment
- 499
- Students per teacher
- 10.8:1
- Resource Index
- 52/100
Similar elementary schools in Norwalk
6 comparable elementary schools (grades K-5) serving the same city.
Tracey Magnet School
Standard public school
434 students 12.4:1 students per teacher
Silvermine Dual Language Magnet School
Standard public school
428 students 13:1 students per teacher
Cranbury Elementary School
Standard public school
410 students 11.4:1 students per teacher
Rowayton School
Standard public school
402 students 11.5:1 students per teacher
Concord Magnet School
Standard public school
388 students 14.9:1 students per teacher
Marvin Elementary School
Standard public school
375 students 12.9:1 students per teacher
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of Connecticut, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~457 students)
Next steps
Verify locally before acting on Jefferson Marine Science Elementary School's federal record.
- Compare Jefferson Marine Science Elementary School against another school. Compare schools
- Norwalk 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 Jefferson Marine Science Elementary School
How many students attend Jefferson Marine Science Elementary School?
Jefferson Marine Science Elementary School has 457 students enrolled. It is an elementary school in Norwalk, CT.
What is the student-teacher ratio at Jefferson Marine Science Elementary School?
The student-teacher ratio at Jefferson Marine Science Elementary School is 13.1:1, which is 8% higher than the Connecticut average of 12.1:1 and 17% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Jefferson Marine Science Elementary School?
55.8% of students at Jefferson Marine Science Elementary School are eligible for free lunch, compared to the Connecticut average of 36.4%.
What is the racial and ethnic makeup of Jefferson Marine Science Elementary School?
The largest demographic group at Jefferson Marine Science Elementary School is Hispanic or Latino at 67.0% of enrollment, in Norwalk, CT. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 52.1/100.
What is the Resource Investment Index for Jefferson Marine Science Elementary School?
Jefferson Marine Science Elementary School has a Resource Investment Index of 46/100 (typical reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Jefferson Marine Science Elementary School rank among elementary schools in Norwalk?
By Resource Investment Index, Jefferson Marine Science Elementary School ranks #6 of 7 elementary schools in Norwalk, CT. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Norwalk on the city page.
Is Jefferson Marine Science Elementary School a good school?
Jefferson Marine Science Elementary School earns 46/100 on the Resource Investment Index, with class sizes larger than 76% of Connecticut 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 Norwalk School District?
Besides Jefferson Marine Science Elementary School, Norwalk School District also operates Brien Mcmahon High School (1,739 students), Norwalk High School (1,494 students), and West Rocks Middle School (657 students). See the Norwalk School District district page for the complete list.
Related tools
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.