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Schools›Massachusetts›Chelsea
SCHOOL COMMUNITY·CHELSEA·NCES 250354002890

Chelsea Opportunity Academy

299 Everett Avenue, Chelsea, MA 02150 · (617) 466-5000 · Suffolk County
GRADES 09–12HIGH21-SUBURBALTERNATIVE EDUCATION SCHOOL132 STUDENTS
·
allk12 Grade
Not graded

Schools serving specialized populations are not graded, because state test results are not a fair comparison for them. How grades work

Enrollment
132
High
DISTRICT 612 · STATE 777
Student : Teacher
18.8:1
7 FTE teachers
DISTRICT 13.4:1 · STATE 23.4:1
Free / Reduced Lunch
,
Title I proxy
Community
0
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.

Enrollment by grade, 2024-25

GradeStudentsShare
Grade 91814%
Grade 104736%
Grade 114433%
Grade 122317%
Student demographics
13%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 20% · STATE 65% · US 70%
White
43%
DISTRICT 5% · STATE 51% · US 43%
Hispanic
12393%
DISTRICT 89% · STATE 26% · US 30%
Black
43%
DISTRICT 5% · STATE 10% · US 15%
Asian
11%
DISTRICT 1% · STATE 7% · US 6%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Male
7355%
Female
5945%

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BeatsExpectations

Not computed for this school
BeatsExpectations is not computed for specialized-population schools (schools for the deaf or blind, therapeutic and behavioral-health placements, juvenile-justice and alternative-education settings, and similar). State ELA/Math proficiency rates are not a comparable metric for these populations, so a demographically-adjusted residual against general-enrollment peers would be misleading. About the methodology →

Where Chelsea Opportunity Academy ranks

Among high schools
MeasureThis schoolIn MassachusettsIn Suffolk County
Enrollment
ranked largest first
132#337 of 379#37 of 43
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.

4-year change

SY 2020-21 vs SY 2024-25
Enrollment
132
+31 (+31%) vs 2020
Student : Teacher
18.8:1
was 25.3:1
Source: NCES Common Core of Data

Enrollment and staffing by year

School yearStudentsTeachers (FTE)Students per teacherFree and reduced lunch
2024-25132718.8:1N/A
2023-24125717.9:1N/A
2022-23115619.2:1N/A
2020-21101425.3:1N/A
Source: NCES Common Core of Data. Rows are the federal collections on file for Chelsea Opportunity Academy.

About Chelsea Opportunity Academy

Chelsea Opportunity Academy is one of the public schools in Chelsea, Massachusetts. It is a very small high school. Total enrollment is 132 students, and the grades served are 9 through 12. High schools in Massachusetts have about 777 students on average; enrollment here is 83% lower.

The district for Chelsea Opportunity Academy is Chelsea, with 11 schools and 6,094 students.

The share of Hispanic students at Chelsea Opportunity Academy is 93%. Next come 3% White and 3% Black. The county population is about 23% Hispanic. The diversity index for Chelsea Opportunity Academy is 13%. For US public schools as a whole it is 70%.

With 7 full-time-equivalent teachers, the student-to-teacher ratio is about 18.8:1. High schools in Massachusetts average 23.4:1, 4.6 more students per teacher than here.

Five-year Census Bureau estimates for Suffolk County show that median household income comes to about $95,631, a bachelor's degree or higher is held by about 51% of adults, and the poverty rate is about 11%. The county's public schools total 157, with about 75,679 students.

Among nearby public schools, Chelsea High is closest at less than a tenth of a mile. Other public schools within five miles number at least 8.

In the federal locale system, Chelsea Opportunity Academy is coded Suburb: Large, for schools in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.

The school grew from 101 students in 2020-21 to 132 in 2024-25. The student-to-teacher ratio went down from 25.3:1 to 18.8:1.

You can use this page to share news and ask questions about open houses, carpools, and field trips. You can also rate the school on this page.

Suffolk County at a glance

View full county profile
Population
785,121
Census ACS
Median income
$95,631
Household, ACS
Bachelor's+
51%
Adults 25+
Poverty rate
11%
Below federal line
Schools in county
157
75,679 students

Quick facts

School name
Chelsea Opportunity Academy
District
Chelsea
Address
299 Everett Avenue, Chelsea, MA 02150
Phone
(617) 466-5000
County
Suffolk County
Level
High
Grade range
09–12
Total enrollment
132
Teachers (FTE)
7
Student–teacher ratio
18.8:1
Locale
21-Suburb: Large
NCES ID
250354002890
Charter school
No
Virtual school
No

Related schools

Other schools in Chelsea
Other schools in Chelsea
Nearby schools

Frequently asked questions

About Chelsea Opportunity Academy
What is the total enrollment at Chelsea Opportunity Academy?
Chelsea Opportunity Academy enrolls approximately 132 students in grades 09-12.
What grades does Chelsea Opportunity Academy serve?
Chelsea Opportunity Academy serves grades 09-12.
How many students per teacher at Chelsea Opportunity Academy?
Approximately 18.8:1 students per teacher at Chelsea Opportunity Academy.
What is the student diversity at Chelsea Opportunity Academy?
Student demographics at Chelsea Opportunity Academy are roughly 3% White, 93% Hispanic, 3% Black, 1% Asian.
Who oversees Chelsea Opportunity Academy?
Chelsea Opportunity Academy is overseen by Chelsea in Suffolk County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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