B Top 41%

Thomas Ditson School

Grades K-04 BILLERICA, MA

Moved up 103 places from 2024 to 2025

#337 State Rank
B+ District Grade
39 Cook Street, BILLERICA, MA 01821
Rating sources & methodology MCAS scores from 2025 Data updated September 2026
538 Students
95.6% Attendance Rate
49.5 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

34% Meeting or exceeding expectations

5% exceeding expectations

2023 49% 49%
2024 38.5% 38.5%
2025 34% 34%

Mathematics

53.5% Meeting or exceeding expectations

9% exceeding expectations

2023 54.5% 54.5%
2024 56.5% 56.5%
2025 53.5% 53.5%
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 41%5%
2025English Language Arts04 27%—
2025Mathematics03 51%10%
2025Mathematics04 56%8%
2024English Language Arts03 39%3%
2024English Language Arts04 38%2%
2024Mathematics03 55%7%
2024Mathematics04 58%9%
2023English Language Arts03 61%11%
2023English Language Arts04 37%6%
2023Mathematics03 55%9%
2023Mathematics04 54%8%

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

538 students enrolled

Race/Ethnicity

White 63.8%
Asian 14.9%
Hispanic 11.2%
Black 4.8%
Multiracial 4.5%

Gender

52.2% Male
47.8% Female

Student Programs

English Learners 5%
Special Education 13.4%
Free/Reduced Lunch 21.7%

School Performance

Key metrics and program information

Attendance

95.6% Attendance Rate
7% Chronic Absence

Staffing

Location

39 Cook Street, BILLERICA, MA

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B-Rated School

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Part of Billerica School District

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Frequently Asked Questions

What is Thomas Ditson School's grade rating?

Thomas Ditson School has earned a grade of B, ranked #337 in Massachusetts, placing it in the top 41% 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 Thomas Ditson School?

Approximately 538 students are enrolled at Thomas Ditson School.

How does Thomas Ditson School perform on MCAS tests?

Based on the most recent MCAS results, Thomas Ditson School's proficiency rates are: English Language Arts (34% proficient), Mathematics (54% proficient). MCAS (Massachusetts Comprehensive Assessment System) tests measure student achievement in English Language Arts, Mathematics, and Science.

What is the attendance rate at Thomas Ditson School?

Thomas Ditson School has an attendance rate of 95.6%. Strong attendance is correlated with better academic outcomes.

What school district is Thomas Ditson School part of?

Thomas Ditson School is part of Billerica 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.