Enrollment
132
Massachusetts · 2024-25 NCES data
High school (grades 9-12) · Chelsea, MA
Chelsea Opportunity Academy
Federal NCES profile for Chelsea Opportunity Academy, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 29/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 250354002890
👥 S:T ratio 12
📚 AP courses 10
🌟 Gifted program 30
🎓 Counselors 65
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Chelsea Opportunity Academy earns 29/100 on the Resource Investment Index, with class sizes larger than 98% of Massachusetts schools. It is also less racially and ethnically mixed than most Massachusetts schools.
- #2 of 3
- high schools in Chelsea · Resource Index
- 29
- Resource Index · Lower
- 22:1
- large classes for Massachusetts
- 132
- students enrolled
Chelsea Opportunity Academy has class sizes larger than 98% of Massachusetts schools. Computed live against every Massachusetts school reporting to NCES.
By Resource Investment Index, Chelsea Opportunity Academy ranks #2 of 3 high schools in Chelsea, MA.
School address
District: Chelsea · Massachusetts
NCES ID 250354002890 Verify on NCES CCD record →
Teachers (FTE)
6.0
Federal CCD staff survey
Students per teacher
22:1
vs 12.3:1 Massachusetts avg
+79% vs state
Student-teacher ratio in context
How Chelsea Opportunity Academy compares with Massachusetts and U.S. medians
What stands out at Chelsea Opportunity Academy
Chelsea Opportunity Academy is a small high school in Chelsea, Massachusetts, enrolling 132 students.
Class loads run heavy: 22:1 is larger than about 98% of Massachusetts schools and 79% above the 12.3:1 state mean, so each teacher carries more students than is typical.
This is a small campus: fewer students than 92% of Massachusetts schools, with 132 enrolled.
Its Resource Investment Index lands in the lower third of 1,831 scored Massachusetts schools.
Its student body is predominantly Hispanic or Latino (93% of enrollment), among the less diverse in the state (diversity index 13/100).
No Advanced Placement courses are reported for this campus in the federal data.
Counselor coverage is strong, about 176 students per counselor, inside the American School Counselor Association's recommended 250:1.
Among Chelsea's high schools, it stands alongside Chelsea High (1,649 students): Chelsea Opportunity Academy is smaller than that campus by headcount and runs heavier classes (22:1 vs 15.1:1).
Chelsea also operates Chelsea High (1,649 students) and Shurtleff Early Childhood (779 students) alongside Chelsea Opportunity Academy.
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 Chelsea Opportunity Academy compares
Chelsea Opportunity Academy on the metrics families compare, against Massachusetts and U.S. means.
| Metric | This school | vs Massachusetts | Massachusetts avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 22:1 | ▲ 79% | 12.3:1 | 15.7:1 |
| Enrollment | 132 | top 92% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
22:1
Leaner classes than 10% of US schools, heavier class loads than most.
132
Bigger than 13% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Staffing depth
22:1
students per teacher
- 79% above state mean
Top 98% in Massachusetts - lower ratio than 2% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Funding equity
$19,814
per pupil, district-wide
- below Massachusetts avg of $22,458
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors0.8 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 3 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 2.3 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 93.2%
White 3.0%
African American 3.0%
Asian 0.8%
Largest group: Hispanic or Latino at 93.2% of enrollment.
Student-body diversity index 13.0/100
Simpson diversity index - at 13.0, Chelsea Opportunity Academy is less mixed than the Massachusetts school average of 47.3.
Programs
AP program Not offered
Funding & spending
District-wide per-pupil expenditure for Chelsea, which includes Chelsea Opportunity Academy.
$19,814
Per student
-12%
vs Massachusetts
Avg $22,458
+19%
vs U.S.
Avg $16,593
Revenue mix
Local 1.9%
State 83.4%
Federal 14.7%
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 Chelsea Opportunity Academy Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Chelsea High | Larger | No free-lunch data | Lower S:T ratio |
| Shurtleff Early Childhood | Larger | No free-lunch data | Lower S:T ratio |
| Clark Avenue School | Larger | No free-lunch data | Lower S:T ratio |
| George F. Kelly Elementary | Larger | No free-lunch data | Lower S:T ratio |
| Joseph a. Browne School | Larger | No free-lunch data | Lower S:T ratio |
Comparisons are relative to Chelsea Opportunity Academy's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,649
- Students per teacher
- 15.1:1
- Resource Index
- 34/100
- Enrollment
- 779
- Students per teacher
- 13.2:1
- Resource Index
- 26/100
- Enrollment
- 673
- Students per teacher
- 13.5:1
- Resource Index
- 30/100
- Enrollment
- 527
- Students per teacher
- 13.9:1
- Resource Index
- 45/100
- Enrollment
- 487
- Students per teacher
- 10.8:1
- Resource Index
- 35/100
Similar high schools in Chelsea
2 comparable high schools (grades 9-12) serving the same city.
Similar high 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 (~132 students)
Next steps
Verify locally before acting on Chelsea Opportunity Academy's federal record.
- Compare Chelsea Opportunity Academy against another school. Compare schools
- Chelsea'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 Chelsea Opportunity Academy
How many students attend Chelsea Opportunity Academy?
Chelsea Opportunity Academy has 132 students enrolled. It is a high school in Chelsea, MA.
What is the student-teacher ratio at Chelsea Opportunity Academy?
The student-teacher ratio at Chelsea Opportunity Academy is 22:1, which is 79% higher than the Massachusetts average of 12.3:1 and 40% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Chelsea Opportunity Academy?
The largest demographic group at Chelsea Opportunity Academy is Hispanic or Latino at 93.2% of enrollment, in Chelsea, MA.
What is the Resource Investment Index for Chelsea Opportunity Academy?
Chelsea Opportunity Academy has a Resource Investment Index of 29/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Chelsea Opportunity Academy rank among high schools in Chelsea?
By Resource Investment Index, Chelsea Opportunity Academy ranks #2 of 3 high schools in Chelsea, MA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Chelsea on the city page.
Is Chelsea Opportunity Academy a good school?
Chelsea Opportunity Academy earns 29/100 on the Resource Investment Index, with class sizes larger than 98% of Massachusetts schools. It is also less racially and ethnically mixed than most 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 Chelsea?
Besides Chelsea Opportunity Academy, Chelsea also operates Chelsea High (1,649 students), Shurtleff Early Childhood (779 students), and Clark Avenue School (673 students). See the Chelsea 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.