B- Top 57%

Dedham High School

Grades 09-12 DEDHAM, MA

Moved down 5 places from 2024 to 2025

#198 State Rank
B District Grade
140 Whiting Avenue, DEDHAM, MA 02026
Active Athletics 28 sports
Rating sources & methodology MCAS scores from 2025 Data updated September 2026
675 Students
93.3% Attendance Rate
52.3 Composite Score
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MCAS score comparisons

Students meeting or exceeding expectations · 2025 results

Each subject shows the average of published grade percentages, without weighting by enrollment. The bars compare available years on a 0–100% scale. Grade coverage and student groups can change between years.

English Language Arts

41% Meeting or exceeding expectations

6% exceeding expectations

2023 64% 64%
2024 61% 61%
2025 41% 41%

Mathematics

56% Meeting or exceeding expectations

13% exceeding expectations

2023 69% 69%
2024 73% 73%
2025 56% 56%

Science

48% Meeting or exceeding expectations

12% exceeding expectations

2023 53% 53%
2024 53% 53%
2025 48% 48%
View published results by year and grade
Available grade results for the latest 3 published years. An em dash means the value was not published.
YearSubjectGradeMeeting+Exceeding
2025English Language Arts10 41%6%
2025Mathematics10 56%13%
2025Science10 48%12%
2024English Language Arts10 61%11%
2024Mathematics10 73%14%
2024Science10 53%10%
2023English Language Arts10 64%18%
2023Mathematics10 69%14%
2023Science10 53%10%

MCAS subject percentages differ from the composite school rating, which combines available academic and school indicators. Letter grades and state ranks compare schools at the same level. A rank change describes relative position, not a percentage-point change in test scores. Read the rating methodology.

Student Demographics

675 students enrolled

Race/Ethnicity

White 63.9%
Hispanic 18.5%
Black 11.1%
Multiracial 3.6%
Asian 2.8%

Gender

49.2% Male
50.5% Female

Student Programs

English Learners 5.9%
Special Education 21.2%
Free/Reduced Lunch 30.4%

Athletics Programs

28 sports programs with 1,516 student athletes

Boys Sports

  • Softball 57 athletes
  • Football 52 athletes
  • Volleyball 48 athletes
  • Basketball 35 athletes
  • Track-Outdoor 34 athletes
  • Baseball 33 athletes
  • Ice Hockey 26 athletes
  • Lacrosse 25 athletes
  • Wrestling 20 athletes
  • Track-Indoor 17 athletes
  • Golf 13 athletes
  • Tennis 10 athletes
  • Cross Country 9 athletes

Girls Sports

  • Wrestling 379 athletes
  • Unified Basketball 379 athletes
  • Tennis 43 athletes
  • Track-Outdoor 42 athletes
  • Cross Country 40 athletes
  • Soccer 38 athletes
  • Ice Hockey 37 athletes
  • Volleyball 36 athletes
  • Track-Indoor 36 athletes
  • Softball 27 athletes
  • Winter Swim/Dive 26 athletes
  • Baseball 21 athletes
  • Gymnastics 18 athletes
  • Basketball 13 athletes
  • Rugby 2 athletes

Sports data from the Massachusetts Interscholastic Athletic Association (MIAA).

School Performance

Key metrics and program information

Graduation

5.5% Dropout Rate

Attendance

93.3% Attendance Rate
18.5% Chronic Absence

Advanced Placement

College Readiness

MassCore is Massachusetts' recommended college-ready curriculum.

Staffing

Location

140 Whiting Avenue, DEDHAM, MA

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B--Rated School

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Part of Dedham School District

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Other Schools in Dedham School District

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A

Greenlodge School

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→ B+

Oakdale School

Elementary • #321 State
→ A-

Dedham Middle School

Middle • #106 State
→ B

Avery School

Elementary • #396 State
→ B-

Riverdale School

Elementary • #442 State
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The Rashi School

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Frequently Asked Questions

What is Dedham High School's grade rating?

Dedham High School has earned a grade of B-, ranked #198 in Massachusetts, placing it in the top 57% 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 Dedham High School?

Approximately 675 students are enrolled at Dedham High School.

How does Dedham High School perform on MCAS tests?

Based on the most recent MCAS results, Dedham High School's proficiency rates are: English Language Arts (41% proficient), Mathematics (56% proficient), Science (48% proficient). MCAS (Massachusetts Comprehensive Assessment System) tests measure student achievement in English Language Arts, Mathematics, and Science.

What sports does Dedham High School offer?

Dedham High School offers 28 athletic programs (13 boys' sports, 15 girls' sports) with approximately 1,516 student athletes participating. Sports programs are sanctioned by the MIAA (Massachusetts Interscholastic Athletic Association).

What is the graduation rate at Dedham High School?

Dedham High School has a strong 90.9% graduation rate. The state average graduation rate in Massachusetts is approximately 89%.

What is the attendance rate at Dedham High School?

Dedham High School has an attendance rate of 93.3%. Strong attendance is correlated with better academic outcomes.

What school district is Dedham High School part of?

Dedham High School is part of Dedham 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.