B- Top 53%

Riverdale School

Grades 01-05 DEDHAM, MA

Moved up 103 places from 2024 to 2025

#442 State Rank
B District Grade
143 Needham Street, DEDHAM, MA 02026
Rating sources & methodology MCAS scores from 2025 Data updated September 2026
194 Students
95.4% Attendance Rate
46.3 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

2% exceeding expectations

2023 48% 48%
2024 39.7% 39.7%
2025 41% 41%

Mathematics

36.3% Meeting or exceeding expectations

3.3% exceeding expectations

2023 49.7% 49.7%
2024 43% 43%
2025 36.3% 36.3%

Science

50% Meeting or exceeding expectations
2023 56% 56%
2024 47% 47%
2025 50% 50%
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 Arts03 57%2%
2025English Language Arts04 36%—
2025English Language Arts05 30%—
2025Mathematics03 45%2%
2025Mathematics04 31%5%
2025Mathematics05 33%3%
2025Science05 50%—
2024English Language Arts03 44%17%
2024English Language Arts04 35%—
2024English Language Arts05 40%7%
2024Mathematics03 43%9%
2024Mathematics04 42%8%
2024Mathematics05 44%5%
2024Science05 47%7%
2023English Language Arts03 48%4%
2023English Language Arts04 44%7%
2023English Language Arts05 52%4%
2023Mathematics03 38%4%
2023Mathematics04 47%9%
2023Mathematics05 64%4%
2023Science05 56%12%

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

194 students enrolled

Race/Ethnicity

White 64.4%
Hispanic 17%
Black 7.7%
Multiracial 7.2%
Asian 3.6%

Gender

44.3% Male
55.7% Female

Student Programs

English Learners 9.3%
Special Education 26.8%
Free/Reduced Lunch 22.7%

School Performance

Key metrics and program information

Attendance

95.4% Attendance Rate
9.2% Chronic Absence

Staffing

Location

143 Needham Street, DEDHAM, MA

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B--Rated School

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Frequently Asked Questions

What is Riverdale School's grade rating?

Riverdale School has earned a grade of B-, ranked #442 in Massachusetts, placing it in the top 53% of Massachusetts Elementary 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 Riverdale School?

Approximately 194 students are enrolled at Riverdale School.

How does Riverdale School perform on MCAS tests?

Based on the most recent MCAS results, Riverdale School's proficiency rates are: English Language Arts (41% proficient), Mathematics (36% proficient), Science (50% proficient). MCAS (Massachusetts Comprehensive Assessment System) tests measure student achievement in English Language Arts, Mathematics, and Science.

What is the attendance rate at Riverdale School?

Riverdale School has an attendance rate of 95.4%. Strong attendance is correlated with better academic outcomes.

What school district is Riverdale School part of?

Riverdale 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.