Enrollment
259
Connecticut · 2024-25 NCES data
Other / mixed grade configuration · Thomaston, CT
Black Rock School
Federal NCES profile for Black Rock School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 48/100.
2024-25 NCES dataOther / mixed grade configurationNCES 090450000906
👥 S:T ratio 58
🌟 Gifted program 30
🎓 Counselors 48
📋 Attendance 55
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Black Rock School earns 48/100 on the Resource Investment Index, with class sizes smaller than 74% of Connecticut schools.
- #3 of 3
- public schools in Thomaston · Resource Index
- 48
- Resource Index · Typical
- 10.4:1
- small classes for Connecticut
- 31.5%
- free-lunch eligible
Black Rock School has class sizes smaller than 74% of Connecticut schools. Computed live against every Connecticut school reporting to NCES.
By Resource Investment Index, Black Rock School ranks #3 of 3 public schools in Thomaston, CT.
School address
District: Thomaston School District · Connecticut
NCES ID 090450000906 Verify on NCES CCD record →
Teachers (FTE)
25.0
Federal CCD staff survey
Students per teacher
10.4:1
vs 12.1:1 Connecticut avg
-14% vs state
Free-lunch eligible
31.5%
vs 36.4% Connecticut avg
-13% vs state
Student-teacher ratio in context
How Black Rock School compares with Connecticut and U.S. medians
What stands out at Black Rock School
Black Rock School is a mid-sized combined-grade school in Thomaston, Connecticut, enrolling 259 students.
Class sizes run a bit leaner than typical: 10.4:1 puts it in the smaller third of Connecticut schools by student-teacher ratio.
Its free-meal eligibility rate of 31.5% lands close to the Connecticut typical range, neither a high- nor low-need campus by this measure.
Enrollment of 259 puts it in the smaller third of Connecticut schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 1,003 scored Connecticut schools.
Against 174 statewide peers matched on enrollment and economic need, it ranks mid-pack at #111.
Its student body is led by White (77%) and Hispanic or Latino (15%) (diversity index 39/100).
Counselor coverage runs a bit thin, about 259 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
Attendance runs somewhat below the norm, with 18.1% of students chronically absent per the 2021-22 civil-rights collection.
Among Thomaston's public schools, it stands alongside Thomaston High School (307 students): Black Rock School is smaller than that campus by headcount and runs heavier classes (10.4:1 vs 9.3:1).
Thomaston School District also operates Thomaston High School (307 students) and Thomaston Center School (196 students) alongside Black Rock 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 Black Rock School compares
Black Rock 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 | 10.4:1 | ▼ 14% | 12.1:1 | 15.7:1 |
| Free-lunch eligible | 31.5% | ▼ 13% | 36.4% | 51.7% |
| Enrollment | 259 | top 84% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
10.4:1
Leaner classes than 87% of US schools, among the more generously staffed nationally.
259
Bigger than 27% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
31.5%
free-lunch eligible
- 13% 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
10.4:1
students per teacher
- 14% below state mean
Top 26% in Connecticut - lower ratio than 74% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
18.1%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$22,410
per pupil, district-wide
- below 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
Counselors1.0 FTE
Per 259 students, the combined health-and-guidance staffing load for this school.
Discipline context
2
in-school suspensions + 5 out-of-school
Suspension rate: 0.8 per 100 students. Combined in-school and out-of-school rate: 2.7 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
White 76.8%
Hispanic or Latino 14.7%
Asian 3.1%
Two or More 3.1%
African American 2.3%
Largest group: White at 76.8% of enrollment.
Student-body diversity index 38.6/100
Simpson diversity index - at 38.6, Black Rock School is less mixed than the Connecticut school average of 50.5.
Programs
Funding & spending
District-wide per-pupil expenditure for Thomaston School District, which includes Black Rock School.
$22,410
Per student
-6%
vs Connecticut
Avg $23,870
+35%
vs U.S.
Avg $16,593
Revenue mix
Local 49.3%
State 42.4%
Federal 8.3%
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 Black Rock School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Thomaston High School | Similar size | Similar economic need | Similar S:T ratio |
| Thomaston Center School | Similar size | Similar economic need | Higher S:T ratio |
Comparisons are relative to Black Rock School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 307
- Students per teacher
- 9.3:1
- Resource Index
- 56/100
- Enrollment
- 196
- Students per teacher
- 15.1:1
- Resource Index
- 52/100
Similar other schools in Thomaston
1 comparable other schools (grades Mixed) serving the same city.
Similar other 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 (~259 students)
Next steps
Verify locally before acting on Black Rock School's federal record.
- Compare Black Rock School against another school. Compare schools
- Thomaston 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 Black Rock School
How many students attend Black Rock School?
Black Rock School has 259 students enrolled. It is a public school in Thomaston, CT.
What is the student-teacher ratio at Black Rock School?
The student-teacher ratio at Black Rock School is 10.4:1, which is 14% lower than the Connecticut average of 12.1:1 and 34% 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 Black Rock School?
31.5% of students at Black Rock School are eligible for free lunch, compared to the Connecticut average of 36.4%.
What is the racial and ethnic makeup of Black Rock School?
The largest demographic group at Black Rock School is White at 76.8% of enrollment, in Thomaston, CT.
What is the Resource Investment Index for Black Rock School?
Black Rock School has a Resource Investment Index of 48/100 (typical 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 Black Rock School rank among public schools in Thomaston?
By Resource Investment Index, Black Rock School ranks #3 of 3 public schools in Thomaston, CT. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Thomaston on the city page.
Is Black Rock School a good school?
Black Rock School earns 48/100 on the Resource Investment Index, with class sizes smaller than 74% 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 Thomaston School District?
Besides Black Rock School, Thomaston School District also operates Thomaston High School (307 students) and Thomaston Center School (196 students). See the Thomaston 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.