Chelsea High School
Grades 09-12 CHELSEA, MA
Improved 25 spots from last year
MCAS Test Scores
Massachusetts Comprehensive Assessment System results
English Language Arts
Mathematics
Science
Score Trends
| Year | Subject | Grade | Proficient+ | Advanced |
|---|---|---|---|---|
| 2025 | English Language Arts | 10 | 21% | 1% |
| 2025 | Mathematics | 10 | 19% | 3% |
| 2025 | Science | 10 | 19% | 2% |
| 2024 | English Language Arts | 10 | 29% | 3% |
| 2024 | Mathematics | 10 | 19% | 2% |
| 2024 | Science | 10 | 21% | 2% |
| 2023 | English Language Arts | 10 | 26% | 3% |
| 2023 | Mathematics | 10 | 20% | 2% |
| 2023 | Science | 10 | 19% | 2% |
| 2022 | English Language Arts | 10 | 30% | 3% |
| 2022 | Mathematics | 10 | 29% | 3% |
| 2022 | Science | 10 | 28% | 4% |
MCAS is administered annually to students in grades 3-8 and 10. Scores reflect the percentage of students meeting or exceeding grade-level expectations.
Student Demographics
1,649 students enrolled
Race/Ethnicity
Gender
Student Programs
Athletics Programs
18 sports programs with 796 student athletes
Boys Sports
- Softball 43 athletes
- Basketball 38 athletes
- Volleyball 36 athletes
- Track-Outdoor 33 athletes
- Rugby 33 athletes
- Football 32 athletes
- Baseball 15 athletes
- Cross Country 11 athletes
- Wrestling 2 athletes
Girls Sports
- Wrestling 243 athletes
- Unified Basketball 155 athletes
- Soccer 34 athletes
- Track-Outdoor 32 athletes
- Volleyball 24 athletes
- Baseball 22 athletes
- Track-Indoor 21 athletes
- Softball 16 athletes
- Basketball 6 athletes
Sports data from the Massachusetts Interscholastic Athletic Association (MIAA).
School Performance
Key metrics and program information
Graduation
Attendance
Advanced Placement
College Readiness
MassCore is Massachusetts' recommended college-ready curriculum.
Staffing
Find Homes Near Chelsea High School
Browse 119 homes for sale in CHELSEA that are zoned for this C--rated high school.
Ready to tour homes in CHELSEA? Schedule a showing with our team.
Frequently Asked Questions
What is Chelsea High School's grade rating?
Chelsea High School has earned a grade of C-, ranked #283 in Massachusetts, placing it in the top 82% of Massachusetts High schools. This rating is based on 2025 MCAS test scores, attendance rates, and other performance metrics from the Massachusetts Department of Elementary and Secondary Education.
How many students attend Chelsea High School?
Approximately 1,649 students are enrolled at Chelsea High School.
How does Chelsea High School perform on MCAS tests?
Based on the most recent MCAS results, Chelsea High School's proficiency rates are: English Language Arts (21% proficient), Mathematics (19% proficient), Science (19% proficient). MCAS (Massachusetts Comprehensive Assessment System) tests measure student achievement in English Language Arts, Mathematics, and Science.
What sports does Chelsea High School offer?
Chelsea High School offers 18 athletic programs (9 boys' sports, 9 girls' sports) with approximately 796 student athletes participating. Sports programs are sanctioned by the MIAA (Massachusetts Interscholastic Athletic Association).
What is the graduation rate at Chelsea High School?
Chelsea High School has a 81.8% graduation rate. The state average graduation rate in Massachusetts is approximately 89%.
What is the attendance rate at Chelsea High School?
Chelsea High School has an attendance rate of 85.7%. Strong attendance is correlated with better academic outcomes.
What school district is Chelsea High School part of?
Chelsea High School is part of Chelsea School District. For enrollment information, contact the district office or visit the school's website. Enrollment typically requires proof of residency within the district boundaries.
How are Massachusetts school ratings calculated?
School ratings are calculated using multiple data points from the Massachusetts Department of Elementary and Secondary Education (DESE), including MCAS test scores (proficiency and growth), attendance rates, graduation rates (for high schools), and student-teacher ratios. Schools are ranked by percentile against similar schools statewide.