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Gibbs School
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2025 Official Accountability Report - Gibbs School
Organization Information
DISTRICT NAME
Arlington (00100000)		TITLE I STATUS
Non-Title I School
SCHOOL
Gibbs School (00100305)		GRADES SERVED
06
REGION
Coastal		FEDERAL DESIGNATION
-

Accountability Information

Overall classificationNot requiring assistance or intervention
Reason for classification
Meeting or exceeding targets
Progress toward improvement targetsAccountability percentile
76% - Meeting or exceeding targets89

Overall progress toward improvement targets

 20242025
Annual criterion-referenced target percentage72%80%
Weight40%60%
Cumulative Criterion-referenced target percentage
(2024 x 40%) + (2025 x 60%)		76%
Meeting or exceeding 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 achievement44-34-
Mathematics achievement44-24-
Science achievement------
Achievement total8867.55867.5
GrowthEnglish language arts growth34-34-
Mathematics growth34-34-
Growth total6822.56822.5
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 absenteeism44-24-
Advanced coursework completion------
Additional indicators total4410.02410.0
Weighted total7.27.6-4.97.6-
Percentage of possible points 95%-65%-
2025 Annual criterion-referenced target percentage80%

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 achievement44-44-
Mathematics achievement34-24-
Science achievement------
Achievement total7867.56867.5
GrowthEnglish language arts growth24-24-
Mathematics growth24-24-
Growth total4822.54822.5
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 absenteeism34-04-
Advanced coursework completion------
Additional indicators total3410.00410.0
Weighted total5.97.6-5.07.6-
Percentage of possible points 78%-66%-
2024 Annual criterion-referenced target percentage72%

Student group percentile

This group's overall performance relative to the performance of the same student group in schools serving similar grades
80

Overall progress toward improvement targets

 20242025
Annual criterion-referenced target percentage83%74%
Weight40%60%
Cumulative Criterion-referenced target percentage
(2024 x 40%) + (2025 x 60%)		77%
Meeting or exceeding 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 achievement44-
Mathematics achievement24-
Science achievement---
Achievement total6867.5
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 absenteeism24-
Advanced coursework completion---
Additional indicators total2410.0
Weighted total5.67.6-
Percentage of possible points 74%-
2025 Annual criterion-referenced target percentage74%

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 achievement44-
Mathematics achievement44-
Science achievement---
Achievement total8867.5
GrowthEnglish language arts growth24-
Mathematics growth24-
Growth total4822.5
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 absenteeism04-
Advanced coursework completion---
Additional indicators total0410.0
Weighted total6.37.6-
Percentage of possible points 83%-
2024 Annual criterion-referenced target percentage83%

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 510.3 512.8 2.5 514.0 5064Recovery Path: Exceeded Target
Lowest Performing 480.7 485.9 5.2 485.8 1163Path Forward: Met Target
High Needs 489.3 494.4 5.1 490.3 1504Recovery Path: Exceeded Target
English Learners and Former English Learners 488.2 494.2 6.0 491.4 394Recovery Path: Exceeded Target
Low Income 488.1 492.7 4.6 490.5 564Recovery Path: Exceeded Target
Students with Disabilities 484.8 490.3 5.5 487.2 904Path Forward: Exceeded Target
American Indian or Alaska Native-------
Asian 505.4 520.9 15.5 507.7 554Recovery Path: Exceeded Target
Black or African American---- 20--
Hispanic or Latino 495.6 500.7 5.1 498.1 364Recovery Path: Exceeded Target
Multi-Race, Not Hispanic or Latino 513.0 511.3 -1.7 514.4 534Path Forward: Exceeded Target
Native Hawaiian or Other Pacific Islander-------
White 513.1 514.7 1.6 514.6 3424Path Forward: Exceeded Target

Mathematics achievement - MCAS average composite scaled score - Non-high school
Group 2024 Achievement 2025 Achievement Change 2025 Target N Points Reason
All Students 509.1 510.8 1.7 510.8 5034Recovery Path: Exceeded Target
Lowest Performing 485.3 487.3 2.0 490.4 1162Path Forward: Improved Below Target
High Needs 495.1 495.4 0.3 497.6 1482Path Forward: Improved Below Target
English Learners and Former English Learners 498.5 500.0 1.5 500.7 402Recovery Path: Improved Below Target
Low Income 491.3 491.3 0.0 493.2 561Recovery Path: No Change
Students with Disabilities 489.4 491.4 2.0 492.6 883Path Forward: Met Target
American Indian or Alaska Native-------
Asian 513.4 523.3 9.9 516.4 554Path Forward: Exceeded Target
Black or African American---- 20--
Hispanic or Latino 500.5 501.1 0.6 503.4 353Path Forward: Met Target
Multi-Race, Not Hispanic or Latino 512.3 511.1 -1.2 513.8 544Path Forward: Exceeded Target
Native Hawaiian or Other Pacific Islander-------
White 509.9 511.3 1.4 511.6 3394Recovery Path: Exceeded Target

Science achievement - MCAS average composite scaled score - Non-high school
Group 2024 Achievement 2025 Achievement Change 2025 Target N Points Reason
All Students-------
Lowest Performing-------
High Needs-------
English Learners and Former English Learners-------
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-------

English language arts growth - Non-high school
Group 2025 Mean SGP N Points Reason
All Students 55.0 4753Typical Growth - High
Lowest Performing 54.0 1163Typical Growth - High
High Needs 51.7 1353Typical Growth - High
English Learners and Former English Learners 55.3 303Typical Growth - High
Low Income 51.8 523Typical Growth - High
Students with Disabilities 51.7 863Typical Growth - High
American Indian or Alaska Native----
Asian 59.7 533Typical Growth - High
Black or African American- 19--
Hispanic or Latino 59.0 303Typical Growth - High
Multi-Race, Not Hispanic or Latino 51.7 483Typical Growth - High
Native Hawaiian or Other Pacific Islander----
White 54.8 3253Typical Growth - High

Mathematics growth - Non-high school
Group 2025 Mean SGP N Points Reason
All Students 51.8 4733Typical Growth - High
Lowest Performing 57.1 1163Typical Growth - High
High Needs 51.5 1343Typical Growth - High
English Learners and Former English Learners 58.2 323Typical Growth - High
Low Income 45.2 512Typical Growth - Low
Students with Disabilities 53.0 843Typical Growth - High
American Indian or Alaska Native----
Asian 55.8 533Typical Growth - High
Black or African American- 19--
Hispanic or Latino 54.3 293Typical Growth - High
Multi-Race, Not Hispanic or Latino 53.9 493Typical Growth - High
Native Hawaiian or Other Pacific Islander----
White 50.5 3233Typical Growth - High

Progress toward attaining English language proficiency - Non-high school
Group 2024 Rate (%) 2025 Rate (%) Change Target N Points Reason
All Students-------
Lowest Performing-------
High Needs-------
English Learners and Former English Learners-------
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 8.5 6.9 -1.6 7.4 5334Exceeded Target
Lowest Performing 11.5 10.3 -1.2 8.2 1162Improved Below Target
High Needs 15.0 13.8 -1.2 12.9 1672Improved Below Target
English Learners and Former English Learners 11.6 10.4 -1.2 8.6 482Improved Below Target
Low Income 22.6 21.2 -1.4 18.3 662Improved Below Target
Students with Disabilities 15.7 12.8 -2.9 13.2 943Met Target
American Indian or Alaska Native-------
Asian 6.1 5.2 -0.9 4.0 584Exceeded Target
Black or African American---- 23--
Hispanic or Latino 11.8 18.4 6.6 7.6 380Declined
Multi-Race, Not Hispanic or Latino 7.8 3.5 -4.3 6.7 574Exceeded Target
Native Hawaiian or Other Pacific Islander-------
White 8.4 5.3 -3.1 7.2 3574Exceeded Target

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 521 51599Yes 1 522 51398Yes 1 0----

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 161 158 163 157 0 0 324 31597Yes1
English Learners and Former English Learners 47 46 47 47 0 0 94 9399Yes1
Low Income 62 60 62 60 0 0 124 12097Yes1
Students with Disabilities 91 90 93 89 0 0 184 17997Yes1
American Indian or Alaska Native-----------
Asian 56 56 56 56 0 0 112 112100Yes1
Black or African American 22 22 22 22 0 0 44 44100Yes1
Hispanic or Latino 38 38 38 37 0 0 76 7599Yes1
Multi-Race, Not Hispanic or Latino 56 55 57 57 0 0 113 11299Yes1
Native Hawaiian or Other Pacific Islander-----------
White 349 344 349 341 0 0 698 68598Yes1


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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