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Conservatory Lab Charter (District)
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2025 Official Accountability Report - Conservatory Lab Charter (District)
Organization Information
DISTRICT NAME
Conservatory Lab Charter (District) (04390000)		TITLE I STATUS
Title I District
REGION
Coastal		GRADES SERVED
PK,K,01,02,03,04,05,06,07,08

Accountability Information

Overall classificationNot requiring assistance or intervention
Reason for classification
Substantial progress toward targets
Progress toward improvement targetsAccountability percentile
56% - Substantial progress toward targets-

Overall progress toward improvement targets

 20242025
Annual criterion-referenced target percentage49%61%
Weight40%60%
Cumulative Criterion-referenced target percentage
(2024 x 40%) + (2025 x 60%)		56%
Substantial progress toward targets

2025 Points awarded

2025 Progress toward improvement targets
Indicator All Students
(Non-high school grades)		 Lowest Performing Students
(Non-high school grades)
Points earned Total possible points Weight % Points earned Total possible points Weight %
AchievementEnglish language arts achievement24-24-
Mathematics achievement34-44-
Science achievement04----
Achievement total51260.06867.5
GrowthEnglish language arts growth34-24-
Mathematics growth34-34-
Growth total6820.05822.5
High school completionFour-year cohort graduation rate------
Extended engagement rate------
Annual dropout rate------
High school completion total------
Progress toward attaining English language proficiencyEnglish language proficiency total0410.0---
Additional indicatorsChronic absenteeism44-44-
Advanced coursework completion------
Additional indicators total4410.04410.0
Weighted total4.69.6-5.67.6-
Percentage of possible points 48%-74%-
2025 Annual criterion-referenced target percentage61%

2024 Points awarded

2024 Progress toward improvement targets
Indicator All Students
(Non-high school grades)		 Lowest Performing Students
(Non-high school grades)
Points earned Total possible points Weight % Points earned Total possible points Weight %
AchievementEnglish language arts achievement04-24-
Mathematics achievement04-44-
Science achievement04----
Achievement total01260.06867.5
GrowthEnglish language arts growth34-34-
Mathematics growth34-34-
Growth total6820.06822.5
High school completionFour-year cohort graduation rate------
Extended engagement rate------
Annual dropout rate------
High school completion total------
Progress toward attaining English language proficiencyEnglish language proficiency total4410.0---
Additional indicatorsChronic absenteeism44-44-
Advanced coursework completion------
Additional indicators total4410.04410.0
Weighted total2.09.6-5.87.6-
Percentage of possible points 21%-76%-
2024 Annual criterion-referenced target percentage49%

Overall progress toward improvement targets

 20242025
Annual criterion-referenced target percentage18%44%
Weight40%60%
Cumulative Criterion-referenced target percentage
(2024 x 40%) + (2025 x 60%)		33%
Moderate progress toward targets

2025 Points awarded

2025 Progress toward improvement targets
Indicator High Needs Student Group
(Non-high school grades)
Points earned Total possible points Weight %
AchievementEnglish language arts achievement24-
Mathematics achievement24-
Science achievement04-
Achievement total41267.5
GrowthEnglish language arts growth34-
Mathematics growth34-
Growth total6822.5
High school completionFour-year cohort graduation rate---
Extended engagement rate---
Annual dropout rate---
High school completion total---
Progress toward attaining English language proficiencyEnglish language proficiency total---
Additional indicatorsChronic absenteeism44-
Advanced coursework completion---
Additional indicators total4410.0
Weighted total4.510.3-
Percentage of possible points 44%-
2025 Annual criterion-referenced target percentage44%

2024 Points awarded

2024 Progress toward improvement targets
Indicator High Needs Student Group
(Non-high school grades)
Points earned Total possible points Weight %
AchievementEnglish language arts achievement04-
Mathematics achievement04-
Science achievement04-
Achievement total01267.5
GrowthEnglish language arts growth34-
Mathematics growth34-
Growth total6822.5
High school completionFour-year cohort graduation rate---
Extended engagement rate---
Annual dropout rate---
High school completion total---
Progress toward attaining English language proficiencyEnglish language proficiency total---
Additional indicatorsChronic absenteeism44-
Advanced coursework completion---
Additional indicators total4410.0
Weighted total1.810.3-
Percentage of possible points 18%-
2024 Annual criterion-referenced target percentage18%

Detailed data for each indicator

English language arts achievement - MCAS average composite scaled score - Non-high school
Group 2024 Achievement 2025 Achievement Change 2025 Target N Points Reason
All Students 494.1 494.2 0.1 497.5 2512Path Forward: Improved Below Target
Lowest Performing 471.3 472.5 1.2 476.4 502Path Forward: Improved Below Target
High Needs 490.7 490.8 0.1 494.2 2032Path Forward: Improved Below Target
English Learners and Former English Learners 487.5 488.2 0.7 490.7 602Recovery Path: Improved Below Target
Low Income 491.4 492.3 0.9 494.4 1792Path Forward: Improved Below Target
Students with Disabilities 478.7 477.8 -0.9 481.0 720Recovery Path: Declined
American Indian or Alaska Native-------
Asian---- 2--
Black or African American 490.4 493.1 2.7 493.7 1262Path Forward: Improved Below Target
Hispanic or Latino 495.3 492.1 -3.2 498.9 1020Recovery Path: Declined
Multi-Race, Not Hispanic or Latino---- 9--
Native Hawaiian or Other Pacific Islander-------
White---- 12--

Mathematics achievement - MCAS average composite scaled score - Non-high school
Group 2024 Achievement 2025 Achievement Change 2025 Target N Points Reason
All Students 487.4 489.8 2.4 489.7 2523Recovery Path: Met Target
Lowest Performing 462.7 469.2 6.5 466.4 504Recovery Path: Exceeded Target
High Needs 484.2 486.8 2.6 487.5 2042Path Forward: Improved Below Target
English Learners and Former English Learners 484.6 487.1 2.5 487.6 603Recovery Path: Met Target
Low Income 484.6 487.8 3.2 487.4 1803Path Forward: Met Target
Students with Disabilities 475.3 474.5 -0.8 477.8 720Recovery Path: Declined
American Indian or Alaska Native-------
Asian---- 2--
Black or African American 483.4 488.3 4.9 486.6 1274Recovery Path: Exceeded Target
Hispanic or Latino 488.3 487.8 -0.5 491.3 1021Recovery Path: No Change
Multi-Race, Not Hispanic or Latino---- 9--
Native Hawaiian or Other Pacific Islander-------
White---- 12--

Science achievement - MCAS average composite scaled score - Non-high school
Group 2024 Achievement 2025 Achievement Change 2025 Target N Points Reason
All Students 489.0 485.5 -3.5 493.3 750Path Forward: Declined
Lowest Performing---- 12--
High Needs 486.8 482.5 -4.3 491.1 600Path Forward: Declined
English Learners and Former English Learners---- 17--
Low Income 485.9 484.9 -1.0 490.0 510Path Forward: Declined
Students with Disabilities---- 21--
American Indian or Alaska Native-------
Asian---- 1--
Black or African American 485.3 480.0 -5.3 489.4 340Path Forward: Declined
Hispanic or Latino 491.9 486.3 -5.6 495.8 360Path Forward: Declined
Multi-Race, Not Hispanic or Latino---- 2--
Native Hawaiian or Other Pacific Islander-------
White---- 2--

English language arts growth - Non-high school
Group 2025 Mean SGP N Points Reason
All Students 50.9 1993Typical Growth - High
Lowest Performing 48.8 492Typical Growth - Low
High Needs 50.9 1623Typical Growth - High
English Learners and Former English Learners 49.1 452Typical Growth - Low
Low Income 51.2 1433Typical Growth - High
Students with Disabilities 49.4 572Typical Growth - Low
American Indian or Alaska Native----
Asian- 2--
Black or African American 51.9 983Typical Growth - High
Hispanic or Latino 47.5 852Typical Growth - Low
Multi-Race, Not Hispanic or Latino- 6--
Native Hawaiian or Other Pacific Islander----
White- 8--

Mathematics growth - Non-high school
Group 2025 Mean SGP N Points Reason
All Students 57.5 1993Typical Growth - High
Lowest Performing 56.2 493Typical Growth - High
High Needs 57.7 1623Typical Growth - High
English Learners and Former English Learners 56.1 453Typical Growth - High
Low Income 57.0 1433Typical Growth - High
Students with Disabilities 52.3 573Typical Growth - High
American Indian or Alaska Native----
Asian- 2--
Black or African American 59.4 983Typical Growth - High
Hispanic or Latino 55.6 853Typical Growth - High
Multi-Race, Not Hispanic or Latino- 6--
Native Hawaiian or Other Pacific Islander----
White- 8--

Progress toward attaining English language proficiency - Non-high school
Group 2024 Rate (%) 2025 Rate (%) Change Target N Points Reason
All Students 62.2 51.5 -10.7 67.6 330Declined
Lowest Performing-------
High Needs-------
English Learners and Former English Learners 62.2 51.5 -10.7 67.6 330Declined
Low Income-------
Students with Disabilities-------
American Indian or Alaska Native-------
Asian-------
Black or African American-------
Hispanic or Latino-------
Multi-Race, Not Hispanic or Latino-------
Native Hawaiian or Other Pacific Islander-------
White-------

Chronic absenteeism - Non-high school
Group 2024 Rate (%) 2025 Rate (%) Change Target N Points Reason
All Students 17.2 12.6 -4.6 15.0 3654Exceeded Target
Lowest Performing 21.6 12.0 -9.6 16.7 504Exceeded Target
High Needs 20.3 14.0 -6.3 17.8 3004Exceeded Target
English Learners and Former English Learners 14.0 4.9 -9.1 10.7 814Exceeded Target
Low Income 21.6 15.7 -5.9 18.9 2684Exceeded Target
Students with Disabilities 20.2 12.0 -8.2 15.9 1004Exceeded Target
American Indian or Alaska Native---- 1--
Asian---- 5--
Black or African American 14.9 11.1 -3.8 11.3 1803Met Target
Hispanic or Latino 20.8 14.6 -6.2 17.0 1514Exceeded Target
Multi-Race, Not Hispanic or Latino---- 14--
Native Hawaiian or Other Pacific Islander-------
White---- 14--

Assessment participation - All students
Group English language arts Mathematics Science
Enrolled Assessed % Met Target? Years in Rate Enrolled Assessed % Met Target? Years in Rate Enrolled Assessed % Met Target? Years in Rate
All Students 251 251100Yes 1 252 252100Yes 1 76 7599Yes 1

Assessment participation - Student Group
Group English language arts Mathematics Science Overall
Enrolled Assessed Enrolled Assessed Enrolled Assessed Total Enrolled Total Assessed % Met Target? Years in Rate
High Needs 203 203 204 204 61 60 468 467100Yes1
English Learners and Former English Learners 60 60 60 60 17 17 137 137100Yes1
Low Income 179 179 180 180 51 51 410 410100Yes1
Students with Disabilities 72 72 72 72 22 21 166 16599Yes1
American Indian or Alaska Native-----------
Asian 2 2 2 2 1 1 5----
Black or African American 126 126 127 127 34 34 287 287100Yes1
Hispanic or Latino 102 102 102 102 37 36 241 240100Yes1
Multi-Race, Not Hispanic or Latino 9 9 9 9 2 2 20----
Native Hawaiian or Other Pacific Islander-----------
White 12 12 12 12 2 2 26----

School Accountability Information
School Accountability information School accountability percentile
Conservatory Lab Charter SchoolNot requiring assistance or intervention 46


About this report

Overall classification: All Massachusetts districts and schools with sufficient data are classified into one of two accountability categories: districts and schools requiring assistance or intervention, and districts and schools not requiring assistance or intervention. The reason(s) for the district's or school's classification are noted on this report.

Progress toward improvement targets: The criterion-referenced target percentage combines multiple years of data related to achievement, growth, high school completion, English learner progress, advanced coursework completion, and chronic absenteeism into a single number between 0 and 100. For a group to be considered to be meeting targets it must have a cumulative criterion-referenced target percentage of 75% or higher.

The annual criterion-referenced target percentage is calculated by dividing the weighted total points earned by the weighted total possible points. The calculation for each is displayed below.

Weighted total of points earned = (Total achievement points earned x Achievement weight) + (Total growth points earned x Growth weight) + (Total high school completion points earned x high school completion weight) + (EL progress points earned x EL progress weight) + (Total additional indicator points earned x Additional indicator weight)

The cumulative criterion-referenced target percentage represents a weighted average of the annual criterion-referenced target percentages. At a minimum, a group must have an annual criterion-referenced target percentage for the most recent year in order to receive a cumulative percentage.

Accountability percentile: An accountability percentile between 1 and 99 is reported for most schools. This number is an indication of the school's overall performance relative to other schools that serve similar grades, and is calculated using multiple years of data for all accountability indicators. School percentiles are not calculated for districts.


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