Enrollment
454
Massachusetts · 2024-25 NCES data
Other / mixed grade configuration · Dorchester, MA
Conservatory Lab Charter School
Federal NCES profile for Conservatory Lab Charter School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 38/100.
2024-25 NCES dataOther / mixed grade configurationNCES 250006001439Charter school
👥 S:T ratio 35
🌟 Gifted program 30
🎓 Counselors 70
📋 Attendance 18
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Conservatory Lab Charter School earns 38/100 on the Resource Investment Index, with class sizes larger than 93% of Massachusetts schools.
- #6 of 26
- schools in Dorchester · Resource Index
- 38
- Resource Index · Typical
- 16.2:1
- large classes for Massachusetts
- 454
- students enrolled
Conservatory Lab Charter School has class sizes larger than 93% of Massachusetts schools. Computed live against every Massachusetts school reporting to NCES.
By Resource Investment Index, Conservatory Lab Charter School ranks #6 of 26 schools in Dorchester, MA.
School address
District: Conservatory Lab Charter (District) · Massachusetts
NCES ID 250006001439 Verify on NCES CCD record →
Teachers (FTE)
28.0
Federal CCD staff survey
Students per teacher
16.2:1
vs 12.3:1 Massachusetts avg
+32% vs state
Student-teacher ratio in context
How Conservatory Lab Charter School compares with Massachusetts and U.S. medians
What stands out at Conservatory Lab Charter School
Conservatory Lab Charter School is a mid-sized charter combined-grade school in Dorchester, Massachusetts, enrolling 454 students.
Class loads run heavy: 16.2:1 is larger than about 93% of Massachusetts schools and 32% above the 12.3:1 state mean, so each teacher carries more students than is typical.
With 454 students, its enrollment sits close to the Massachusetts median campus size.
Its Resource Investment Index lands in the lower third of 1,831 scored Massachusetts schools.
Its student body is led by African American (50%) and Hispanic or Latino (41%) (diversity index 58/100).
Counselor coverage is strong, about 151 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 32.8% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Its district draws 15.2% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Among Dorchester's public schools, it stands alongside Boston Latin Academy (1,693 students): Conservatory Lab Charter School is smaller than that campus by headcount and runs leaner classes (16.2:1 vs 18.6:1).
Conservatory Lab Charter (District) is a single-school charter district, so Conservatory Lab Charter School operates independently rather than alongside district-mates.
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 Conservatory Lab Charter School compares
Conservatory Lab Charter School on the metrics families compare, against Massachusetts and U.S. means.
| Metric | This school | vs Massachusetts | Massachusetts avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 16.2:1 | ▲ 32% | 12.3:1 | 15.7:1 |
| Enrollment | 454 | top 44% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.2:1
Leaner classes than 36% of US schools, a middle-of-the-pack class size.
454
Bigger than 55% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
16.2:1
students per teacher
- 32% above state mean
Top 93% in Massachusetts - lower ratio than 7% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
32.8%
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
$26,834
per pupil, district-wide
- above Massachusetts avg of $22,458
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors3.0 FTE
Per 151 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
African American 50.4%
Hispanic or Latino 41.0%
White 3.7%
Two or More 2.9%
Asian 1.1%
American Indian / Alaska Native 0.7%
Native Hawaiian / Pacific Islander 0.2%
Largest group: African American at 50.4% of enrollment.
Student-body diversity index 57.6/100
Simpson diversity index - at 57.6, Conservatory Lab Charter School is more mixed than the Massachusetts school average of 47.3.
Programs
Funding & spending
District-wide per-pupil expenditure for Conservatory Lab Charter (District), which includes Conservatory Lab Charter School.
$26,834
Per student
+19%
vs Massachusetts
Avg $22,458
+62%
vs U.S.
Avg $16,593
Revenue mix
Local 78.2%
State 6.6%
Federal 15.2%
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.
Similar other schools in Dorchester
6 comparable other schools (grades Mixed) serving the same city.
Boston Latin Academy
Standard public school
1,693 students 18.6:1 students per teacher
Murphy K-8 School
Standard public school
855 students 12.2:1 students per teacher
Techboston Academy
Standard public school
850 students 11.3:1 students per teacher
Neighborhood House Charter School
Standard public school
786 students 10.3:1 students per teacher
Boston Collegiate Charter School
Standard public school
708 students 9.4:1 students per teacher
Up Academy Holland
Standard public school
641 students 13.9:1 students per teacher
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Massachusetts, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~454 students)
Similar student-teacher ratio (~16.2:1)
Next steps
Verify locally before acting on Conservatory Lab Charter School's federal record.
- Compare Conservatory Lab Charter School against another school. Compare schools
- Conservatory Lab Charter (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 Conservatory Lab Charter School
How many students attend Conservatory Lab Charter School?
Conservatory Lab Charter School has 454 students enrolled. It is a public school in Dorchester, MA.
What is the student-teacher ratio at Conservatory Lab Charter School?
The student-teacher ratio at Conservatory Lab Charter School is 16.2:1, which is 32% higher than the Massachusetts average of 12.3:1 and 3% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Conservatory Lab Charter School?
The largest demographic group at Conservatory Lab Charter School is African American at 50.4% of enrollment, in Dorchester, MA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 57.6/100.
What is the Resource Investment Index for Conservatory Lab Charter School?
Conservatory Lab Charter School has a Resource Investment Index of 38/100 (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 Conservatory Lab Charter School rank among schools in Dorchester?
By Resource Investment Index, Conservatory Lab Charter School ranks #6 of 26 schools in Dorchester, MA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Dorchester on the city page.
Is Conservatory Lab Charter School a good school?
Conservatory Lab Charter School earns 38/100 on the Resource Investment Index, with class sizes larger than 93% of Massachusetts 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 Conservatory Lab Charter (District)?
None; Conservatory Lab Charter (District) is a single-school charter district, and Conservatory Lab Charter School is its only campus.
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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.