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Massachusetts public elementary school

Conservatory Lab Charter School

Conservatory Lab Charter (District) school district

C-
overall grade

Ranks #862 of 895 Massachusetts elementary schools.

Overall rank
#862
of 895 schools
ELA · 2024–2026
33%
MA average 42%
Math · 2024–2026
25%
MA average 43%
Avg class size
18
455 students

ELA and Math show the share of 3rd graders meeting or exceeding expectations on the MCAS, averaged over 2024–2026.

How it compares

What stands out
  • Best of its categories: Attendance, in the bottom 43% statewide. Students attend 94.1% of school days on average.
  • Area to watch: Teacher quality ranks in the bottom 1% statewide.
  • Trend: Chronic absence has fallen from 36.1% in 2022 to 16% in 2025.
  • Trend: ELA is down 11 points since 2023 (43% to 32%).
Where it stands among 895 Massachusetts elementary schools
Bottom of MATop of MA
Overall
Well below averagebottom 4% · #862
ELA
Below averagebottom 34% · #597
Math
Below averagebottom 21% · #716
Attendance
Averagebottom 43% · #517
Teacher quality
Well below averagebottom 1% · #889

MCAS standings use the 2024–2026 average of grade 3 results, so one unusual year doesn't swing a school's ranking. Scores in the sections below are from 2026.

Test scores

ELA has been above the state average in 2 of 8 years since 2018. Math has been below the state average every year since 2018.

Share of 3rd graders meeting or exceeding expectations on the MCAS. There was no test in 2020.

English Language Arts32%in 2026 · state 43%
11 points below the state
0%50%100%This school32%State43%20172019202120232026
Math17%in 2026 · state 42%
25 points below the state
0%50%100%This school17%State42%20172019202120232026
Detailed scores
Average scaled score, ELA (500+ = meeting expectations)489
Average scaled score, Math (500+ = meeting expectations)480
Achievement percentile vs. MA schools (ELA · Math)29th · 13th

Students & classrooms

Classrooms
Students455
Average class size18MA avg 18
Students per teacher16.5MA avg 12.1
Who attends
Black/African American
50.1%
Hispanic/Latino
41.3%
White
3.7%
Multi-Race
2.9%
Asian
1.1%
American Indian/Alaska Native
0.7%
Native Hawaiian/Pacific Islander
0.2%

51.4% girls · 48.6% boys

Student needs
Low incomeHigher than average
This school
70.6%
MA avg
42.8%
English learnersLower than average
This school
9%
MA avg
17.2%
Students with disabilitiesAbout average
This school
24%
MA avg
22.3%

Teachers

Licensed teachersWorse than average
This school
61.9%
MA avg
98.4%
Experienced teachersWorse than average
This school
38.2%
MA avg
73.2%
Teaching in their fieldWorse than average
This school
34.3%
MA avg
92.4%
Stayed from last yearWorse than average
This school
70%
MA avg
82.7%
More staffing details
Teachers (full-time equivalent)27.5
Principal retention100%
General education teachers100%

Attendance & safety

Attendance rateAbout average
This school
94.1%
MA avg
94.1%
Chronically absentmissed 10%+ of daysAbout average
This school
16%
MA avg
15.6%

10.9 days absent per student (MA avg 10.3) · Suspensions: Not reported

About Boston

Suffolk County · Greater Boston — Inside I-95
Avg single-family home value$615KMA median $588K
Avg property tax bill$7,627MA median $6,814
Tax rate$12.40 per $1,000MA median $12.40
Income per person$67,404MA median $47,872
Local kids in public school86.4%
Town bond ratingAAA

Conservatory Lab Charter (District) district profile · What could you afford here? · All towns A–Z

Town figures are FY2026 averages for single-family homes from the Massachusetts Department of Revenue. Assessed values usually run below recent sale prices. "MA median" is the median of the state's 351 towns.

Similar schools elsewhere

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