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Conservatory Lab Charter School

Q: Is Conservatory Lab Charter School a good school?

Conservatory Lab Charter School ranks 582 nd of 906 Massachusetts elementary schools. SchoolDigger rates this school 2 stars out of 5.

Public, Charter Grades PK, KG-8

582^nd

SchoolDigger Rank ?

of 906 Massachusetts Elementary Schools

Better than 36% of Massachusetts elementary schools

Summary

Conservatory Lab Charter School is a public charter school serving 444 students in grades PK-8 in Dorchester, Massachusetts. While the school's overall academic performance has consistently ranked in the bottom half of Massachusetts elementary schools, it stands out in its ability to effectively serve certain student subgroups.

On the Conservatory Lab Charter district level, the school is ranked 255 out of 348 districts in the state and has a 1-star rating from SchoolDigger. However, the school performs relatively well for African American and Hispanic students in English Language Arts (ELA) and for English Language Learners in both ELA and Math, ranking in the top 50 Massachusetts elementary schools for these subgroups. In contrast, the school's proficiency rates on MCAS Next Generation assessments are below the state average across all grades and subjects, with 37.85% in ELA and 30.16% in Math, compared to the state averages of 41.53% and 40.74% respectively.

Compared to nearby district schools like Everett Elementary, Winthrop Elementary, and King Elementary, which generally perform worse on MCAS assessments and have lower SchoolDigger rankings, Conservatory Lab Charter School may be providing a relatively stronger educational experience despite its own challenges. The school's lower per-student spending and higher student-teacher ratio compared to nearby district schools suggest that it is operating with tighter budgets and resources, which could be a factor in its overall academic performance.

454

Students ?

16.5

Student/teacher ratio ?

$24,122

Per pupil spending ?

64.4%

Free/discounted lunch ?

395 Columbia Rd
Dorchester, MA 02125

(617) 254-8904

District: Conservatory Lab Charter

Racial breakdown:

African American:

50.4%

Hispanic:

41.0%

White:

3.7%

See top rated Massachusetts elementary schools

Compare Conservatory Lab Charter School to nearby elementary schools!

At a glance

▬ Ranking trend: Holding steady — 34th percentile in 2014 → 36th in 2025

Worth a look

!Test scores below the Massachusetts average (32% vs 41% meeting standards)

!Civics scores 27 pts below the Massachusetts average

Students meeting standards (2024-2025) ?

This school32%

District avg32%

Massachusetts avg41%

Elementary school

582^nd of 906

Massachusetts public elementary schools ?

Bottom 36%▲ up 24 pts since 2016

From bottom 12% (2016) to bottom 36% (2025)

See the entire ranking list of Massachusetts Elementary Schools →

★★★★★

SchoolDigger rating ?

Middle school

280^th of 484

Massachusetts public middle schools ?

Bottom 42%▲ up 36 pts since 2016

From bottom 6% (2016) to bottom 42% (2025)

See the entire ranking list of Massachusetts Middle Schools →

★★★★★

SchoolDigger rating ?

255^th of 348Conservatory Lab Charter among Massachusetts districts

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Elementary school ranking

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	36.6	582 of 906	35.8%	★★☆☆☆
2024	33.1	609 of 916	33.5%	★★☆☆☆
2023	45.0	518 of 928	44.2%	★★☆☆☆
2022	35.0	616 of 932	33.9%	★★☆☆☆
2021	29.8	664 of 936	29.1%	★☆☆☆☆
2019	30.1	693 of 942	26.4%	★☆☆☆☆
2018	26.9	718 of 934	23.1%	★☆☆☆☆
2017	30.8	692 of 938	26.2%	★☆☆☆☆
2016	15.8	824 of 932	11.6%	★☆☆☆☆
2014	40.0	613 of 926	33.8%	★★☆☆☆
2013	59.8	412 of 928	55.6%	★★★☆☆
2012	46.1	554 of 930	40.4%	★★☆☆☆
2011	53.5	482 of 924	47.8%	★★☆☆☆
2010	29.9	700 of 920	23.9%	★☆☆☆☆
2009	28.3	708 of 909	22.1%	★☆☆☆☆
2008	31.5	674 of 908	25.8%	★☆☆☆☆
2007	33.2	675 of 911	25.9%	★☆☆☆☆
2006	18.7	767 of 911	15.8%	★☆☆☆☆
2005	12.9	789 of 887	11.0%	★☆☆☆☆
2004	6.1	840 of 882	4.8%	☆☆☆☆☆
2003	16.0	753 of 884	14.8%	★☆☆☆☆

African American

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	66.4	32 of 169	81.1%	★★★★☆
2024	56.9	46 of 167	72.5%	★★★★☆
2023	64.6	42 of 167	74.9%	★★★★☆
2022	49.7	72 of 173	58.4%	★★★☆☆
2021	32.6	115 of 166	30.7%	★★☆☆☆
2019	43.0	97 of 172	43.6%	★★☆☆☆
2018	43.2	97 of 174	44.3%	★★☆☆☆

Disabled

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2022	30.5	459 of 672	31.7%	★★☆☆☆

English Language Learner

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2022	82.9	14 of 267	94.8%	★★★★★
2021	74.1	20 of 240	91.7%	★★★★★
2019	69.4	40 of 258	84.5%	★★★★☆

Female

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	40.3	519 of 869	40.3%	★★☆☆☆
2024	32.1	606 of 886	31.6%	★★☆☆☆
2023	44.6	505 of 887	43.1%	★★☆☆☆
2022	32.6	610 of 901	32.3%	★★☆☆☆
2021	25.8	670 of 898	25.4%	★☆☆☆☆
2019	25.6	717 of 902	20.5%	★☆☆☆☆
2018	27.5	687 of 893	23.1%	★☆☆☆☆

Hispanic

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	69.7	75 of 458	83.6%	★★★★☆
2024	69.3	77 of 446	82.7%	★★★★☆
2023	76.3	52 of 420	87.6%	★★★★☆
2022	68.8	77 of 401	80.8%	★★★★☆
2021	67.5	69 of 379	81.8%	★★★★☆
2019	72.3	69 of 398	82.7%	★★★★☆
2018	56.4	136 of 379	64.1%	★★★☆☆

Low Socio Economic Status

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	64.9	191 of 736	74.0%	★★★★☆
2024	50.2	347 of 760	54.3%	★★★☆☆
2023	67.4	168 of 757	77.8%	★★★★☆
2022	53.9	328 of 772	57.5%	★★★☆☆
2021	40.1	428 of 705	39.3%	★★☆☆☆
2019	40.3	432 of 700	38.3%	★★☆☆☆
2018	33.7	519 of 685	24.2%	★☆☆☆☆

Male

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	34.5	576 of 884	34.8%	★★☆☆☆
2024	35.3	583 of 891	34.6%	★★☆☆☆
2023	44.0	505 of 896	43.6%	★★☆☆☆
2022	38.9	557 of 908	38.7%	★★☆☆☆
2021	34.8	599 of 904	33.7%	★★☆☆☆
2019	35.3	618 of 907	31.9%	★★☆☆☆
2018	25.6	706 of 898	21.4%	★☆☆☆☆

Special Education

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	39.9	391 of 717	45.5%	★★☆☆☆
2024	34.8	467 of 731	36.1%	★★☆☆☆
2023	39.7	392 of 703	44.2%	★★☆☆☆
2022	49.0	436 of 905	51.8%	★★★☆☆
2021	36.2	589 of 894	34.1%	★★☆☆☆
2019	40.7	564 of 896	37.1%	★★☆☆☆
2018	37.2	603 of 886	31.9%	★★☆☆☆

Tested In Person

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2021	29.6	657 of 925	29.0%	★☆☆☆☆

Tested Remotely

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2021	41.4	208 of 399	47.9%	★★☆☆☆

Middle school ranking

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	38.5	280 of 484	42.1%	★★☆☆☆
2024	43.4	254 of 493	48.5%	★★☆☆☆
2023	42.5	275 of 501	45.1%	★★☆☆☆
2022	31.4	338 of 497	32.0%	★★☆☆☆
2021	18.2	412 of 501	17.8%	★☆☆☆☆
2019	23.5	385 of 498	22.7%	★☆☆☆☆
2018	25.7	362 of 484	25.2%	★☆☆☆☆
2017	11.0	443 of 487	9.0%	☆☆☆☆☆
2016	8.2	452 of 482	6.2%	☆☆☆☆☆
2014	41.5	284 of 455	37.6%	★★☆☆☆

African American

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	59.1	62 of 206	69.9%	★★★★☆
2024	50.9	89 of 202	55.9%	★★★☆☆
2022	44.8	105 of 212	50.5%	★★★☆☆
2021	33.8	133 of 193	31.1%	★★☆☆☆
2019	47.6	94 of 195	51.8%	★★★☆☆
2018	53.8	69 of 172	59.9%	★★★☆☆

English Language Learner

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2022	78.7	5 of 154	96.8%	★★★★★

Female

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	35.1	291 of 473	38.5%	★★☆☆☆
2024	37.5	283 of 481	41.2%	★★☆☆☆
2023	33.3	324 of 489	33.7%	★★☆☆☆
2022	26.7	369 of 494	25.3%	★☆☆☆☆
2021	13.1	432 of 483	10.6%	★☆☆☆☆
2019	19.7	396 of 478	17.2%	★☆☆☆☆
2018	26.5	356 of 463	23.1%	★☆☆☆☆

Hispanic

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	68.4	88 of 376	76.6%	★★★★☆
2024	71.5	79 of 378	79.1%	★★★★☆
2023	61.0	112 of 364	69.2%	★★★☆☆
2022	63.7	96 of 368	73.9%	★★★★☆
2021	47.8	147 of 335	56.1%	★★★☆☆
2019	47.4	156 of 322	51.6%	★★★☆☆
2018	40.8	187 of 309	39.5%	★★☆☆☆

Low Socio Economic Status

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	54.5	177 of 464	61.9%	★★★☆☆
2024	59.2	157 of 469	66.5%	★★★☆☆
2023	48.1	230 of 481	52.2%	★★★☆☆
2022	51.6	199 of 489	59.3%	★★★☆☆
2021	28.9	356 of 462	22.9%	★☆☆☆☆
2019	34.6	318 of 452	29.6%	★☆☆☆☆
2018	44.1	260 of 438	40.6%	★★☆☆☆

Male

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2025	55.9	187 of 473	60.5%	★★★☆☆
2024	59.3	171 of 483	64.6%	★★★☆☆
2023	53.4	206 of 489	57.9%	★★★☆☆
2022	37.8	293 of 497	41.0%	★★☆☆☆
2021	24.6	362 of 485	25.4%	★☆☆☆☆
2018	21.4	374 of 466	19.7%	★☆☆☆☆

Special Education

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2022	47.0	236 of 503	53.1%	★★★☆☆
2021	24.9	401 of 489	18.0%	★☆☆☆☆
2019	34.6	332 of 484	31.4%	★★☆☆☆
2018	46.2	238 of 467	49.0%	★★☆☆☆

Tested In Person

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2021	17.3	409 of 491	16.7%	★☆☆☆☆

Tested Remotely

Year	Avg score	Statewide rank	Massachusetts percentile	Rating
2021	26.1	254 of 339	25.1%	★☆☆☆☆

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

Elementary school

English Language Learner (2022)95th percentile+61 vs school

Hispanic (2025)84th percentile+48 vs school

African American (2025)81st percentile+45 vs school

Low Socio Economic Status (2025)74th percentile+38 vs school

Tested Remotely (2021)48th percentile+19 vs school

Special Education (2025)45th percentile+10 vs school

Female (2025)40th percentile+5 vs school

Male (2025)35th percentile~ school

Disabled (2022)32nd percentile~ school

Tested In Person (2021)29th percentile~ school

Middle school

English Language Learner (2022)97th percentile+65 vs school

Hispanic (2025)77th percentile+34 vs school

African American (2025)70th percentile+28 vs school

Low Socio Economic Status (2025)62nd percentile+20 vs school

Male (2025)60th percentile+18 vs school

Special Education (2022)53rd percentile+21 vs school

Female (2025)38th percentile-4 vs school

Tested Remotely (2021)25th percentile+7 vs school

Tested In Person (2021)17th percentile~ school

By subject vs Massachusetts (2024-2025) ?

English Language Arts38%-4 vs state

Mathematics30%-11 vs state

Science24%-18 vs state

Civics12%-27 vs state

★

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Schools Near Conservatory Lab Charter School

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Finance All

School													Students/Teachers											Ranking (2025)				Ranking (2024)				MCAS Next Generation English Language Arts (2025)							MCAS Next Generation Mathematics (2025)							MCAS Next Generation Science (2025)			MCAS Next Generation Civics (2025)	Per Pupil Expenditures (2024)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	SchoolDigger Rating (2025)	Average Standard Score (2024)	Statewide Rank (2024)	State Percentile (2024)	Rank Change from Previous Year	MCAS Next Generation English Language Arts 3rd Grade	MCAS Next Generation English Language Arts 4th Grade	MCAS Next Generation English Language Arts 5th Grade	MCAS Next Generation English Language Arts 6th Grade	MCAS Next Generation English Language Arts 7th Grade	MCAS Next Generation English Language Arts 8th Grade	MCAS Next Generation English Language Arts All Grades	MCAS Next Generation Mathematics 3rd Grade	MCAS Next Generation Mathematics 4th Grade	MCAS Next Generation Mathematics 5th Grade	MCAS Next Generation Mathematics 6th Grade	MCAS Next Generation Mathematics 7th Grade	MCAS Next Generation Mathematics 8th Grade	MCAS Next Generation Mathematics All Grades	MCAS Next Generation Science 5th Grade	MCAS Next Generation Science 8th Grade	MCAS Next Generation Science All Grades	MCAS Next Generation Civics 8th Grade	Total
Conservatory Lab Charter School	Public, Charter	PK, KG-8	395 Columbia Rd	Dorchester	02125	Suffolk County	Conservatory Lab Charter	Yes	No	No	Yes	(617) 254-8904	454	27	16.5		17 (3.7%)	229 (50.4%)	186 (41.0%)	5 (1.1%)	3 (0.7%)	1 (0.2%)	13 (2.9%)	36.6	582^nd of 906 public elementary schools	35.8%		33.1	609^th of 916 public elementary schools	33.5%	27	38.0	33.3	33.3	51.2	40.0	32.0	37.9	35.3	33.3	27.5	32.6	28.0	16.0	30.2	26.0	20.0	24.0	12.0	$24,122
King Elementary School	Public	PK, KG-6	77 Lawrence Avenue	Dorchester	02121	Suffolk County	Boston	No	No	No	Yes	(617) 635-8212	464	47	9.9		21 (4.5%)	230 (49.6%)	194 (41.8%)	4 (0.9%)	2 (0.4%)	0 (0.0%)	13 (2.8%)	4.6	896^th of 906 public elementary schools	1.1%		6.1	898^th of 916 public elementary schools	2.0%	2	11.9	8.7	7.7	15.0			10.9	3.4	2.1	2.6	5.0			3.2	2.8		2.8		$37,686
UP Academy Holland	Public	PK, KG-6	85 Olney Street	Dorchester	02121	Suffolk County	Boston	No	No	No	Yes	(617) 635-8832	641	44	14.4		15 (2.3%)	294 (45.9%)	292 (45.6%)	12 (1.9%)	4 (0.6%)	1 (0.2%)	23 (3.6%)	18.1	762^nd of 906 public elementary schools	15.9%		7.2	885^th of 916 public elementary schools	3.4%	123	29.0	29.6	15.3	12.0			21.4	52.6	19.3	11.2	6.6			21.6	10.2		10.2		$35,519
Mather Elementary School	Public	PK, KG-6	24 Parish Street	Dorchester	02122	Suffolk County	Boston	No	No	No	Yes	(617) 635-8757	473	44	10.8		32 (6.8%)	168 (35.5%)	93 (19.7%)	156 (33.0%)	4 (0.8%)	2 (0.4%)	18 (3.8%)	22	706^th of 906 public elementary schools	22.1%		32.9	613^th of 916 public elementary schools	33.1%	93	35.2	17.2	17.9	31.9			24.9	25.0	29.2	26.8	23.4			26.3	23.2		23.2		$35,435
Everett Elementary School	Public	PK, KG-6	71 Pleasant Street	Dorchester	02125	Suffolk County	Boston	No	No	No	Yes	(617) 635-8778	288	26	11.2		32 (11.1%)	119 (41.3%)	97 (33.7%)	32 (11.1%)	2 (0.7%)	0 (0.0%)	6 (2.1%)	27.9	654^th of 906 public elementary schools	27.8%		27.6	660^th of 916 public elementary schools	27.9%	6	44.1	30.3	48.7	10.8			33.3	26.5	21.2	21.6	10.8			19.9	35.1		35.1		$33,138
Haynes Early Education Center	Public	PK, KG-1	263 Blue Hill Avenue	Roxbury	02119	Suffolk County	Boston	No	No	No	Yes	(617) 635-6446	168	15	11.0		6 (3.6%)	75 (44.6%)	80 (47.6%)	3 (1.8%)	1 (0.6%)	0 (0.0%)	3 (1.8%)								(n/a)																			$38,814
Winthrop Elementary School	Public	PK, KG-6	35 Brookford Street	Dorchester	02125	Suffolk County	Boston	No	No	No	Yes	(617) 635-8379	226	25	9.2		8 (3.5%)	114 (50.4%)	86 (38.1%)	6 (2.7%)	2 (0.9%)	1 (0.4%)	9 (4.0%)	36.7	581^st of 906 public elementary schools	35.9%		29.5	644^th of 916 public elementary schools	29.7%	63	20.0	20.0	40.0	52.4			31.3	20.0	28.0	30.0	66.7			34.4	45.0		45.0		$35,779
UP Academy Charter School of Dorchester	Public, Charter	PK, KG-8	35 Westville Street	Boston	02124	Suffolk County	UP Academy Charter School of Dorchester	Yes	No	No	Yes	(617) 635-8810	640	58	11.0		8 (1.3%)	324 (50.6%)	279 (43.6%)	11 (1.7%)	1 (0.2%)	1 (0.2%)	16 (2.5%)	13.1	812^th of 906 public elementary schools	10.4%		11.5	844^th of 916 public elementary schools	7.9%	32	14.9	16.9	22.8	36.1	16.7	27.3	22.3	11.9	11.3	8.9	9.8	16.7	15.2	12.3	20.0	7.6	13.2	40.9	$22,029
Russell Elementary School	Public	PK, KG-5	750 Columbia Road	Dorchester	02125	Suffolk County	Boston	No	No	No	Yes	(617) 635-8803	356	30	11.8		22 (6.2%)	110 (30.9%)	211 (59.3%)	8 (2.2%)	0 (0.0%)	2 (0.6%)	3 (0.8%)	11.9	828^th of 906 public elementary schools	8.6%		13.1	822^nd of 916 public elementary schools	10.3%	6	23.8	12.5	23.5				19.8	14.3	0.0	20.6				11.2	20.6		20.6		$32,273
Bridge Boston Charter School	Public, Charter	PK, KG-8	435 Warren St.	Roxbury	02119	Suffolk County	Bridge Boston Charter School	Yes	No	No	Yes	(857) 229-1601	329	30	10.7		3 (0.9%)	194 (59.0%)	119 (36.2%)	3 (0.9%)	0 (0.0%)	1 (0.3%)	9 (2.7%)	32.6	614^th of 906 public elementary schools	32.2%		24.4	697^th of 916 public elementary schools	23.9%	83	18.9	33.3	30.6	50.0	29.6	45.0	33.2	24.3	30.8	41.7	39.3	25.9	55.0	34.8	16.7	20.0	17.9	25.0	$31,986

Frequently Asked Questions about Conservatory Lab Charter School

Is Conservatory Lab Charter School a good school?

Conservatory Lab Charter School ranks 582^nd of 906 Massachusetts elementary schools. SchoolDigger rates this school 2 stars out of 5.

What district is Conservatory Lab Charter School in?

Conservatory Lab Charter

What is the racial makeup of Conservatory Lab Charter School?

Students at Conservatory Lab Charter School are 50% African American, 41% Hispanic, 4% White, 3% Two or more races, 1% Asian.

How many students attend Conservatory Lab Charter School?

In the 2024-25 school year, 454 students attended Conservatory Lab Charter School.

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SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Massachusetts Department of Elementary and Secondary Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.