The Chelsea High School is located in Chelsea, Massachusetts, United States and is the only public high school in Chelsea. It is a part of Chelsea Public Schools. Established in 1845, Chelsea High moved into its current school building in 1996.
Serving 125 students in grades 9-12, Chelsea Opportunity Academy ranks in the bottom 50% of all schools in Massachusetts for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is <50% (which is lower than the Massachusetts state average of 51%). The percentage of students achieving proficiency in reading/language arts is <50% (which is lower than the Massachusetts state average of 54%).
The student-teacher ratio of 18:1 is higher than the Massachusetts state level of 12:1.
Minority enrollment is 95% of the student body (majority Hispanic), which is higher than the Massachusetts state average of 47% (majority Hispanic).
Quick Facts (2026)
- School Type: Alternative school
- Grades: 9-12
- Enrollment: 125 students
- Student-Teacher Ratio: 18:1
- Minority Enrollment: 95%
- Graduation Rate: 15-19% (Btm 50% in MA)
- Math Proficiency: <50% (Top 1%)
- Reading Proficiency: <50% (Top 1%)
- Source: National Center for Education Statistics (NCES), MA Dept. of Education
<Â鶹¹û¶³´«Ã½ class='so-dt-title' id="overview">School Overview <Â鶹¹û¶³´«Ã½ class='so-dt-title' id="school-rankings">School Rankings <Â鶹¹û¶³´«Ã½ class='so-dt-title' id='faq'>Frequently Asked Questions
Chelsea Opportunity Academy's student population of 125 students has grown by 23% over five school years.
The teacher population of 7 teachers has grown by 40% over five school years.
School Type
Grades Offered
Grades 9-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
125 students
Gender %
Total Classroom Teachers
7 teachers
Year Founded
1845
The diversity score of Chelsea Opportunity Academy is 0.15, which is less than the diversity score at state average of 0.65. The school's diversity has stayed relatively flat over five school years.
Math Test Scores (% Proficient)
(18-19)<50%
51%
Reading/Language Arts Test Scores (% Proficient)
(18-19)<50%
54%
Student-Teacher Ratio
18:1
12:1
American Indian
n/a
n/a
Asian
2%
7%
Hispanic
92%
25%
Black
1%
10%
White
5%
53%
Hawaiian
n/a
n/a
Two or more races
n/a
5%
All Ethnic Groups
Graduation Rate
15-19%
90%
Participates in the National School Lunch Program (NSLP)
Yes
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), MA Dept. of Education
<Â鶹¹û¶³´«Ã½ class='so-dt-title' id="school-notes">School Notes- School Mascot: Red Devil
What schools are Chelsea Opportunity Academy often compared to?
Chelsea Opportunity Academyis often viewed alongside schools like Phoenix Academy Charter Public High School Chelsea, Chelsea Virtual Learning Academy, Pioneer Charter School Of Science by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
<50% of students have achieved math proficiency (compared to the 51% MA state average), while <50% of students have achieved reading proficiency (compared to the 54% MA state average).
What is the graduation rate of Chelsea Opportunity Academy?
The graduation rate of Chelsea Opportunity Academy is 15-19%, which is lower than the Massachusetts state average of 90%.
How many students attend Chelsea Opportunity Academy?
125 students attend Chelsea Opportunity Academy.
What is the racial composition of the student body?
92% of Chelsea Opportunity Academy students are Hispanic, 5% of students are White, 2% of students are Asian, and 1% of students are Black.
What is the student-teacher ratio of Chelsea Opportunity Academy?
Chelsea Opportunity Academy has a student ration of 18:1, which is higher than the Massachusetts state average of 12:1.
What grades does Chelsea Opportunity Academy offer ?
Chelsea Opportunity Academy offers enrollment in grades 9-12 (Supplemental Virtual).
What school district is Chelsea Opportunity Academy part of?
Chelsea Opportunity Academy is part of Chelsea School District.
School ReviewsReview Chelsea Opportunity Academy. Reviews should be a few sentences in length. Please include any comments on:
- Quality of academic programs, teachers, and facilities
- Availability of music, art, sports and other extracurricular activities
Review Chelsea Opportunity Academy. Reviews should be a few sentences in length. Please include any comments on:
- Quality of academic programs, teachers, and facilities
- Availability of music, art, sports and other extracurricular activities
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