Enrollment
339
Connecticut · 2024-25 NCES data
2024-25 NCES data Other / mixed grade configuration NCES 090177000313
Charles Barnum Magnet School — Groton, CT
Federal NCES profile for Charles Barnum Magnet School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators — Resource Investment Index 38/100.
👥 Class size 50
🌟 Gifted program 30
📋 Attendance 33
How this works: Each indicator above is scored 0–100 from federal NCES and CRDC data, then averaged into the Resource Investment Index. This measures resource allocation — staffing, programs, and support services — not standardized test scores or academic outcomes. Full methodology →
School address
District: Groton School District · Connecticut
Public location data per NCES (National Center for Education Statistics) Common Core of Data. Verify the school's current address on the NCES CCD record.
Teachers (FTE)
28.0
Federal CCD staff survey
Students per teacher
12.4:1
vs 12.1:1 Connecticut avg
+2% vs state
Free-lunch eligible
26.5%
vs 36.4% Connecticut avg
-27% vs state
Student-teacher ratio in context
How Charles Barnum Magnet School compares with Connecticut and U.S. medians
The federal record — no proprietary index, no editorial formula.
PlainSchools publishes the actual federal measurements — enrollment, staffing, demographics, discipline, and finance — straight from the NCES Common Core of Data, CRDC, and F-33 surveys. No composite rating, no opinion-based score on top. You get the same raw numbers researchers and policymakers use, with benchmarks, spending context, and equity indicators computed from the same federal datasets. Full methodology linked below.
What this school's NCES data tells you
Charles Barnum Magnet School reports 339 enrolled students to the National Center for Education Statistics (NCES) alongside 28.0 full-time-equivalent teachers, producing a 12.4:1 student-teacher ratio. That figure sits 2% above the Connecticut state mean of 12.1:1, signalling larger average class loads than peers in the same state. Against the national 2024-25 average of 15.9:1, it is 22% lower, a useful calibration for families comparing districts across state lines.
Title I and federal lunch eligibility offer another window into the student body: 26.5% of pupils qualify for free meals, a proxy for household income that federal programs use to direct funding. The free-lunch share is 27% below the Connecticut average and 49% below the national baseline. Chronic absenteeism — missing 10% or more of school days — stands at 26.8% according to the 2021-22 Civil Rights Data Collection.
On the finance side, the surrounding Groton School District spends $28,275 per pupil district-wide, above the Connecticut average of $28,239 and above the national average of $19,490. Revenue comes 48.5% from local sources (property taxes), 45.0% from the state, and 6.5% from federal programs per the NCES F-33 finance survey. Taken together, these measurements produce a Resource Investment Index of 38/100 (F), calculated from 3 distinct NCES and CRDC indicators measuring resource allocation rather than academic outcomes.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Charles Barnum Magnet School compares
Cross-validating school-level NCES values against Connecticut state and U.S. national means lets readers see whether this school is an outlier or in line with peers.
| Metric | This school | vs Connecticut | Connecticut avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 12.4:1 | ▲ 2% | 12.1:1 | 15.9:1 |
| Free-lunch eligible | 26.5% | ▼ 27% | 36.4% | 51.8% |
| Enrollment | 339 | top 33% | — | — |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
What the federal data reveals about equity at this school
Federal measurements — not ratings — surface the resource and opportunity picture. Below are the indicators that researchers, civil-rights monitors, and funding formulas use to assess equity.
Economic need
26.5%
free-lunch eligible
— 27% below the Connecticut average of 36.4%
Below the 40% Title I threshold — federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
12.4:1
students per teacher
— 2% above state mean
Top 64% in Connecticut — lower ratio than 36% of state schools
Below the 15:1 benchmark — typical of schools with smaller class sizes and more individualized attention.
Engagement
26.8%
chronically absent (missed 10%+ of school days)
Chronic absenteeism at or above 20% — the CDC threshold for "high" — signals significant barriers to regular attendance.
Funding equity
$28,275
per pupil, district-wide
— above Connecticut avg of $28,239
Above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
2
in-school suspensions + 5 out-of-school
Suspension rate: 0.6 per 100 students. Combined in-school and out-of-school rate: 2.1 per 100 students. Reported via the Civil Rights Data Collection.
Overview
Enrollment 339 Top 33% in Connecticut — larger than 67% of 1,005 state schools
Teachers (FTE) 28.0
Students per teacher 12.4:1 +2% vs state
Free-lunch eligible 26.5% -27% vs state
NCES ID 090177000313
Student demographics
White 51.3%
Hispanic or Latino 27.4%
Two or More 11.5%
African American 7.1%
Asian 2.4%
Native Hawaiian / Pacific Islander 0.3%
Largest group: White at 51.3% of enrollment.
Programs & staff
Counselors (FTE) 0.0
Discipline & special education
Chronically absent 26.8%
In-school suspensions 2
Out-of-school suspensions 5
Funding & spending
District-wide per-pupil expenditure for Groton School District, which includes Charles Barnum Magnet School.
$28,275
Per student
+0%
vs Connecticut
Avg $28,239
+45%
vs U.S.
Avg $19,490
Revenue mix
Local 48.5%
State 45.0%
Federal 6.5%
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.
Other Schools in This District
- Enrollment
- 942
- Students per teacher
- 10.6:1
- Enrollment
- 884
- Students per teacher
- 11.8:1
- Enrollment
- 520
- Students per teacher
- 12.8:1
- Enrollment
- 501
- Students per teacher
- 12.3:1
- Enrollment
- 392
- Students per teacher
- 12.6:1
Similar other schools in Groton
1 comparable other schools (grades Mixed) serving the same city.
Educator & family resources
In-depth guides on understanding NCES data, school choice, and education funding.
Understanding NCES data
How CCD, CRDC and EDFacts feed every public-school number you see.
Choose a school district
Eight signals that matter more than the overall ranking number.
How schools are funded
Title I, F-33, state aid formulas and what per-pupil spending really means.
Chronic absenteeism
Why missing 10% of school matters and how it varies by district.
Magnet vs charter vs traditional
Three school types, three funding models, three sets of trade-offs.
School discipline data
What CRDC suspension and expulsion records do and don't reveal.
Frequently asked questions about Charles Barnum Magnet School
How many students attend Charles Barnum Magnet School?
Charles Barnum Magnet School has 339 students enrolled. It is a other school in Groton, CT.
What is the student-teacher ratio at Charles Barnum Magnet School?
The student-teacher ratio at Charles Barnum Magnet School is 12.4:1, which is 2% higher than the Connecticut average of 12.1:1 and 22% lower than the national average of 15.9:1.
What percentage of students receive free lunch at Charles Barnum Magnet School?
26.5% of students at Charles Barnum Magnet School are eligible for free lunch, compared to the Connecticut average of 36.4%.
What is the racial and ethnic makeup of Charles Barnum Magnet School?
The largest demographic group at Charles Barnum Magnet School is White at 51.3%. The school serves a diverse student body in Groton, CT.
What is the Resource Investment Index for Charles Barnum Magnet School?
Charles Barnum Magnet School has a Resource Investment Index of 38/100 (F) based on 3 factors: student-teacher ratio, attendance rates. This index measures federal resource allocation — staffing levels, program availability, and support services — not standardized test scores or academic outcomes.