A- Top 25%

Byam School

Grades K-04 CHELMSFORD, MA

Moved down 2 places from 2024 to 2025

#206 State Rank
A District Grade
25 Maple Road, CHELMSFORD, MA 01824
High Attendance 96.1%
Rating sources & methodology MCAS scores from 2025 Data updated September 2026
507 Students
96.1% Attendance Rate
54.5 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

60.5% Meeting or exceeding expectations

6.5% exceeding expectations

2023 54.5% 54.5%
2024 51% 51%
2025 60.5% 60.5%

Mathematics

50.5% Meeting or exceeding expectations

12.5% exceeding expectations

2023 47.5% 47.5%
2024 61% 61%
2025 50.5% 50.5%
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 65%10%
2025English Language Arts04 56%3%
2025Mathematics03 50%13%
2025Mathematics04 51%12%
2024English Language Arts03 58%9%
2024English Language Arts04 44%8%
2024Mathematics03 54%16%
2024Mathematics04 68%16%
2023English Language Arts03 64%11%
2023English Language Arts04 45%2%
2023Mathematics03 46%8%
2023Mathematics04 49%9%

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

507 students enrolled

Race/Ethnicity

White 64.3%
Asian 15%
Hispanic 10.8%
Black 4.5%
Multiracial 4.1%

Gender

51.7% Male
48.3% Female

Student Programs

English Learners 7.5%
Special Education 18.1%
Free/Reduced Lunch 17.6%

School Performance

Key metrics and program information

Attendance

96.1% Attendance Rate
4.3% Chronic Absence

Staffing

Location

25 Maple Road, CHELMSFORD, MA

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A--Rated School

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Part of Chelmsford School District

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Frequently Asked Questions

What is Byam School's grade rating?

Byam School has earned a grade of A-, ranked #206 in Massachusetts, placing it in the top 25% 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 Byam School?

Approximately 507 students are enrolled at Byam School.

How does Byam School perform on MCAS tests?

Based on the most recent MCAS results, Byam School's proficiency rates are: English Language Arts (60% proficient), Mathematics (50% proficient). MCAS (Massachusetts Comprehensive Assessment System) tests measure student achievement in English Language Arts, Mathematics, and Science.

What is the attendance rate at Byam School?

Byam School has an attendance rate of 96.1%. Strong attendance is correlated with better academic outcomes.

What school district is Byam School part of?

Byam School is part of Chelmsford 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.