Excellent
#134 of 1,791 schools in MA
Top 7% in state
Wm Diamond Middle
Middle School · Lexington
99 Hancock Street, Lexington, MA 02420
Enrollment
927
Student-Teacher
9.5:1
Score
8.5
Grades
6th – 8th
Enrollment
927
Student-Teacher
9.5:1
Score
8.5
Grades
6th – 8th
Updated
2022-23
Updated 2022-23
How this school compares
In Lexington
#8 of 11
public schools
Massachusetts middle schools
#22 of 305
In district
#8 of 10
Lexington
Equity
9.9 / 10
Exceptional
About Wm Diamond Middle
Wm Diamond Middle is a public middle school in Lexington, MA, part of the Lexington. The school serves approximately 927 students in grades 6th – 8th with a student-teacher ratio of 9.5:1. It holds a MySchoolScout rating of 8.5/10, placing it in the 92.6th percentile among MA schools — an above average rating overall.
Students demonstrate 83% proficiency in math, 40 points above the state average and 78% in reading/language arts, 33 points above the state average. The school scores particularly well in school environment (8.7/10). Located in a neighborhood with a median household income of $233,068, where 85% of adults hold a bachelor's degree or higher.
The school is situated in a large suburban setting.
What Parents Should Know
With a student-teacher ratio of 9.5:1, Wm Diamond Middle offers a notably low ratio compared to the national average. This typically means smaller class sizes and more opportunities for one-on-one interaction between students and teachers.
Score Breakdown
Full Profile · 3/3 metricsView breakdown
View breakdown
View breakdown
Wm Diamond Middle — Students at Wm Diamond Middle score 80% proficient, which is above what's typical for similar communities (expected: 57%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
0%
Students qualifying for federal meal assistance
Test Scores MA MCAS (2024-25)
Based on 74 test records from MA state assessments. About our data
Proficiency Trend
↓ DecliningAverage proficiency (% at or above grade level) across Math & ELA over time.
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Source: EdFacts (NCES) and state assessment data. Growth score: 7.2/10.
How Wm Diamond Middle Compares
See how Wm Diamond Middle performs across key quality dimensions compared to state benchmarks.
Performance Trends
Math proficiency has declined from 88% (2019) to 83% (2022). Reading/ELA proficiency has declined from 85% (2019) to 78% (2022).
Location
99 Hancock Street, Lexington, MA 02420
Nearby Alternatives
Families considering Wm Diamond Middle may also want to explore other middle schools in the area. Joseph Estabrook (rated 9.3/10, 1.1 miles away), which scores slightly higher. Another option is Bowman (rated 9.3/10, 2.8 miles away), which scores slightly higher. Additionally, Lexington High (rated 9.1/10, 1.4 miles away), which scores slightly higher. For more schools in Lexington, see our Lexington schools guide .
Nearby Schools
20 within 3.2 mi| School | Distance | Rating |
|---|---|---|
| Fiske Lexington | 0.5 mi | 6.9 |
| NEW ENGLAND INNOVATION ACADEMY Lexington | 0.7 mi | 6.1 |
| Joseph Estabrook Lexington | 1.1 mi | 9.3 |
| FUSION ACADEMY BURLINGTON Burlington | 1.1 mi | — |
| Lexington High Lexington | 1.4 mi | 9.1 |
| MEADOWRIDGE PELHAM ACADEMY Lexington | 1.8 mi | — |
| Lexington Children's Place Lexington | 1.9 mi | 8.1 |
| Bridge Lexington | 1.9 mi | 9.1 |
| Maria Hastings Lexington | 1.8 mi | 8.7 |
| FUSE SCHOOL Lexington | 1.7 mi | — |
| Jonas Clarke Middle Lexington | 2.3 mi | 9.0 |
| Harrington Lexington | 2.0 mi | 8.5 |
| PRIMROSE SCHOOL OF BURLINGTON Burlington | 2.5 mi | — |
| Francis Wyman Elementary Burlington | 2.6 mi | 7.8 |
| Bowman Lexington | 2.8 mi | 9.3 |
| BEDFORD MONTESSORI SCHOOL Bedford | 2.4 mi | — |
| Burlington High Burlington | 2.7 mi | 7.0 |
| COTTING SCHOOL Lexington | 3.0 mi | 7.1 |
| LEXINGTON CHRISTIAN ACADEMY Lexington | 2.6 mi | 6.9 |
| LEXINGTON MONTESSORI SCHOOL Lexington | 3.2 mi | 7.8 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 02420 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$233,068
Median Home Value
$1,148,100
Median Rent
$2,771/mo
Population
16,287
College Educated
85.3%
Homeownership
86.8%
Avg Commute
30.2 min
Poverty Rate
2.4%
Median Age
45.1
Community Profile
The community surrounding Wm Diamond Middle has a median household income of $233,068. It is a well-educated community where 85% of adults hold a bachelor's degree or higher. The median home value in the area is $1,148,100, with a median rent of $2,771/month. The local poverty rate of 2.4% is relatively low. The average commute for residents is 30 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Pollard Middle Needham, MA | 8.5 |
| John F Kennedy Middle Waltham, MA | 8.6 |
| Marshall Simonds Middle Burlington, MA | 8.4 |
| Oak Hill Middle Newton Centre, MA | 8.6 |
| Raymond J Grey Junior High Acton, MA | 8.3 |
| Concord Middle Concord, MA | 8.8 |
Frequently Asked Questions
Common questions about Wm Diamond Middle
What grades does Wm Diamond Middle serve?
Wm Diamond Middle serves students in grades 6th through 8th.
How many students attend Wm Diamond Middle?
Wm Diamond Middle has an enrollment of approximately 927 students.
What is the student-teacher ratio at Wm Diamond Middle?
The student-teacher ratio at Wm Diamond Middle is 9.5:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Wm Diamond Middle rank in MA?
Wm Diamond Middle is ranked #134 out of 1,791 schools in MA.
What is Wm Diamond Middle's MySchoolScout rating?
Wm Diamond Middle has a composite rating of 8.5 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.
What are the test scores at Wm Diamond Middle?
Based on the most recent state assessment data, Wm Diamond Middle has 82.6% math proficiency and 78.1% reading/ELA proficiency.
Is Wm Diamond Middle a charter school?
No, Wm Diamond Middle is not a charter school. It is a traditional public school operated by the local school district.
Is Wm Diamond Middle a Title I school?
No, Wm Diamond Middle is not currently a Title I school.
Neighborhood Context
- Walk Score
- 16 Car-Dependent
- Transit Score
- 28 Some Transit
- Bike Score
- 45 Somewhat Bikeable
- City Safety
- Average (390/100K)
Powered by 
FBI UCR 2024. City-level (Lexington). Data >1 year old.
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 6th – 8th
- Enrollment
- 927
- Student-Teacher Ratio
- 9.5:1
- Teachers (FTE)
- 98
- Type
- regular
- Setting
- Large Suburb
- County
- Middlesex County
- Phone
- (781) 861-2460
- Data Year
- 2023–2024
Resources & Links
District
Lexington- District Enrollment
- 6,805
- Schools in District
- 10
- Per-Pupil Spending
- $26,005
- District Rank
- #8 of 10
Other Schools in This District
How We Rate Schools
Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.
Read our full methodologyRelated reading
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