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Catherine Kolnaski Magnet School

Q: Is Catherine Kolnaski Magnet School a good school?

Catherine Kolnaski Magnet School ranks 242 nd of 493 Connecticut elementary schools. SchoolDigger rates this school 3 stars out of 5.

Public, Magnet Grades PK, KG-5

242^nd

SchoolDigger Rank ?

of 493 Connecticut Elementary Schools

Better than 51% of Connecticut elementary schools

Summary

Catherine Kolnaski Magnet School is an elementary school located in Groton, Connecticut, serving 369 students in grades K-5. It is part of the Groton School District, which is ranked 104 out of 156 districts in the state and has a 2-star rating from SchoolDigger.

The school generally outperforms the Groton School District and the state of Connecticut in standardized test scores, particularly in English Language Arts (ELA) and Science. In the 2024-2025 school year, 62.1% of 5th graders were proficient or better in ELA, compared to 58.1% for the district and 52.5% for the state. Additionally, 67.2% of 5th graders were proficient or better in Science, compared to 60.6% for the district and 52.2% for the state. The school also performs exceptionally well for its Hispanic and Low Socioeconomic Status (SES) student subgroups, ranking in the top quartile of Connecticut elementary schools in these categories.

However, Catherine Kolnaski Magnet School has experienced higher chronic absenteeism rates compared to the state average, ranging from 14.8% to 21.8% over the past few years. This is an area of concern that the school and district should address to improve student attendance and engagement. Additionally, while the school outperforms some nearby magnet schools, it lags behind the performance of Quaker Hill Elementary School, a non-magnet school in the Waterford School District, which consistently outperforms Catherine Kolnaski Magnet School in standardized test scores.

375

Students ?

11.9

Student/teacher ratio ?

$21,873

Per pupil spending ?

80.3%

Free/discounted lunch ?

500 Poquonnock Rd.
Groton, CT 06340

(860) 449-5608

District: Groton School District

Students who attend Catherine Kolnaski Magnet School usually attend:

Middle:	Groton Middle School
High:	Robert E. Fitch High School

Racial breakdown:

White:

38.4%

Hispanic:

30.4%

Two or more races:

17.9%

See top rated Connecticut elementary schools

Compare Catherine Kolnaski Magnet School to nearby elementary schools!

At a glance

▲ Ranking trend: Improving — 30th percentile in 2015 → 51st in 2025

Strengths

✓Ranking is trending up — up 21 percentile points since 2015

✓Above the Connecticut median (51st percentile)

✓Small classes — about 12 students per teacher

Worth a look

!Some student groups rank well below the school's overall statewide standing

Students meeting standards (2024-2025) ?

This school54%

District avg52%

Connecticut avg50%

242^nd of 493

Connecticut public elementary schools ?

Top 49%▲ up 21 pts since 2015

From bottom 30% (2015) to top 49% (2025)

See the entire ranking list of Connecticut Elementary Schools →

★★★★★

SchoolDigger rating ?

2^nd of 5Elementary Schools in the Groton School District

104^th of 156Groton School District among Connecticut districts

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

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2025	53.5	242 of 493	50.9%	★★★☆☆
2024	56.4	220 of 497	55.7%	★★★☆☆
2023	33.3	309 of 491	37.1%	★★☆☆☆
2022	47.2	261 of 490	46.7%	★★☆☆☆
2021	43.5	287 of 538	46.7%	★★☆☆☆
2019	45.1	290 of 522	44.4%	★★☆☆☆
2018	36.3	342 of 532	35.7%	★★☆☆☆
2017	35.6	336 of 519	35.3%	★★☆☆☆
2016	26.9	375 of 518	27.6%	★☆☆☆☆
2015	33.2	388 of 551	29.6%	★☆☆☆☆
2013	20.7	471 of 557	15.4%	★☆☆☆☆
2012	29.8	450 of 564	20.2%	★☆☆☆☆
2011	30.7	449 of 565	20.5%	★☆☆☆☆
2010	38.9	428 of 579	26.1%	★☆☆☆☆

Female

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2021	39.7	258 of 455	43.3%	★★☆☆☆

Hispanic

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2023	68.5	20 of 108	81.5%	★★★★☆
2021	62.1	52 of 173	69.9%	★★★★☆

Low Socio Economic Status

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2021	66.3	75 of 302	75.2%	★★★★☆

Male

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2021	39.5	254 of 445	42.9%	★★☆☆☆

Special Education

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2021	59.6	128 of 371	65.5%	★★★☆☆

White

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2025	33.2	192 of 248	22.6%	★☆☆☆☆

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)

Hispanic (2023)81st percentile+44 vs school

Low Socio Economic Status (2021)75th percentile+29 vs school

Special Education (2021)65th percentile+19 vs school

Female (2021)43rd percentile-3 vs school

Male (2021)43rd percentile-4 vs school

White (2025)23rd percentile-28 vs school

By subject vs Connecticut (2024-2025) ?

Science67%+15 vs state

English Language Arts54%+4 vs state

Mathematics49%~ state avg

★

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Schools Near Catherine Kolnaski Magnet School

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

School													Students/Teachers											Ranking (2025)				Ranking (2024)				NGSS Science (2025)	SBAC English Language Arts (2025)			SBAC Mathematics (2025)			Per Pupil Expenditures (2025)
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	NGSS Science 5th Grade	SBAC English Language Arts 3rd Grade	SBAC English Language Arts 4th Grade	SBAC English Language Arts 5th Grade	SBAC Mathematics 3rd Grade	SBAC Mathematics 4th Grade	SBAC Mathematics 5th Grade	Total
Catherine Kolnaski Magnet School	Public, Magnet	PK, KG-5	500 Poquonnock Rd.	Groton	06340	Southeastern Connecticut Planning Region	Groton School District	No	Yes	No	Yes	(860) 449-5608	375	31	11.9	80.3%	144 (38.4%)	18 (4.8%)	114 (30.4%)	30 (8.0%)	2 (0.5%)	0 (0.0%)	67 (17.9%)	53.5	242^nd of 493 public elementary schools	50.9%		56.4	220^th of 497 public elementary schools	55.7%	22	67.2	50.0	50.0	62.1	50.0	48.4	50.0	$21,873
Thames River Magnet School	Public, Magnet	PK, KG-5	250 Brandegee Avenue	Groton	06340	Southeastern Connecticut Planning Region	Groton School District	No	Yes	No	No	(860) 980-8230	501	41	12.2	74.3%	200 (39.9%)	48 (9.6%)	127 (25.3%)	39 (7.8%)	5 (1.0%)	1 (0.2%)	81 (16.2%)	51.5	247^th of 493 public elementary schools	49.9%		52.9	238^th of 497 public elementary schools	52.1%	9	64.6	39.4	60.3	61.5	34.8	54.4	50.8	$22,566
Regional Multicultural Magnet School	Public, Magnet	K-5	1 Bulkeley Place	New London	06320	Southeastern Connecticut Planning Region	Learn	No	Yes	No	Yes	(860) 437-7775	469	35	13.5	70.6%	88 (18.8%)	43 (9.2%)	264 (56.3%)	6 (1.3%)	0 (0.0%)	0 (0.0%)	68 (14.5%)	21.8	363^rd of 493 public elementary schools	26.4%		19.4	367^th of 497 public elementary schools	26.2%	4		30.6	36.5	52.7	23.6	25.4	28.4	$19,820
C.B. Jennings International Elementary Magnet	Public, Magnet	PK, KG-5	50 Mercer Street	New London	06320	Southeastern Connecticut Planning Region	New London School District	No	Yes	No	Yes	(860) 447-6050	406	43	9.4	91.6%	26 (6.4%)	81 (20.0%)	266 (65.5%)	3 (0.7%)	1 (0.2%)	1 (0.2%)	28 (6.9%)	4.6	486^th of 493 public elementary schools	1.4%		5.4	485^th of 497 public elementary schools	2.4%	1	19.7	12.2	15.1		12.2	11.3	7.9	$26,349
Winthrop STEM Elementary Magnet School	Public, Magnet	PK, KG-5	74 Grove Street	New London	06320	Southeastern Connecticut Planning Region	New London School District	No	Yes	No	Yes	(860) 447-6070	449	42	10.8	73.9%	74 (16.5%)	75 (16.7%)	243 (54.1%)	5 (1.1%)	4 (0.9%)	1 (0.2%)	47 (10.5%)	22.8	355^th of 493 public elementary schools	28.0%		22.5	358^th of 497 public elementary schools	28.0%	3	48.8	21.3	35.2	45.2	22.7	38.0	22.6	$23,813
Charles Barnum Magnet School	Public	PK, KG-5	68 Briar Hill Rd.	Groton	06340	Southeastern Connecticut Planning Region	Groton School District	No	No	No	No	(860) 449-5640	339	29	11.7	51.3%	174 (51.3%)	24 (7.1%)	93 (27.4%)	8 (2.4%)	0 (0.0%)	1 (0.3%)	39 (11.5%)	37.5	295^th of 493 public elementary schools	40.2%		48.9	255^th of 497 public elementary schools	48.7%	40	59.4	29.3	45.7	51.6	37.9	43.5		$22,716
Nathan Hale Arts Magnet School	Public, Magnet	PK, KG-5	37 Beech Drive	New London	06320	Southeastern Connecticut Planning Region	New London School District	No	Yes	No	Yes	(860) 447-6060	445	56	8.0	77.1%	69 (15.5%)	61 (13.7%)	242 (54.4%)	8 (1.8%)	1 (0.2%)	1 (0.2%)	63 (14.2%)	7	469^th of 493 public elementary schools	4.9%		7.4	460^th of 497 public elementary schools	7.4%	9	30.1	15.2	17.9	22.9	8.9	12.5	10.8	$25,644
Mystic River Magnet School	Public, Magnet	PK, KG-5	160 Fishtown Rd	Mystic	06355	Southeastern Connecticut Planning Region	Groton School District	No	Yes	No	No	(860) 980-8300	520	44	11.9	81.3%	224 (43.1%)	38 (7.3%)	160 (30.8%)	35 (6.7%)	3 (0.6%)	2 (0.4%)	58 (11.2%)	34.6	307^th of 493 public elementary schools	37.7%		36	302^nd of 497 public elementary schools	39.2%	5		37.0	47.5		52.1	39.3	34.5	$23,852
Great Neck Elementary School	Public	PK, KG-5	165 Great Neck Rd.	Waterford	06385	Southeastern Connecticut Planning Region	Waterford School District	No	No	No	Yes	(860) 442-2593	309	30	10.2	29.1%	220 (71.2%)	4 (1.3%)	51 (16.5%)	5 (1.6%)	0 (0.0%)	3 (1.0%)	26 (8.4%)	65.8	199^th of 493 public elementary schools	59.6%		73.8	151^st of 497 public elementary schools	69.6%	48			56.4	63.0		61.8	65.2	$25,350
Quaker Hill Elementary School	Public	K-5	285 Bloomingdale Rd.	Quaker Hill	06375	Southeastern Connecticut Planning Region	Waterford School District	No	No	No	Yes	(860) 442-1095	331	30	10.9	38.4%	197 (59.5%)	15 (4.5%)	68 (20.5%)	30 (9.1%)	1 (0.3%)	2 (0.6%)	18 (5.4%)	68	183^rd of 493 public elementary schools	62.9%		67	187^th of 497 public elementary schools	62.4%	4	59.3	62.1		61.0	67.2		57.6	$25,440

Frequently Asked Questions about Catherine Kolnaski Magnet School

What district is Catherine Kolnaski Magnet School in?

Groton School District

How many students attend Catherine Kolnaski Magnet School?

In the 2024-25 school year, 375 students attended Catherine Kolnaski Magnet School.

What is the racial makeup of Catherine Kolnaski Magnet School?

Students at Catherine Kolnaski Magnet School are 38% White, 30% Hispanic, 18% Two or more races, 8% Asian, 5% African American.

Is Catherine Kolnaski Magnet School a good school?

Catherine Kolnaski Magnet School ranks 242^nd of 493 Connecticut elementary schools. SchoolDigger rates this school 3 stars out of 5.

What schools do graduates of Catherine Kolnaski Magnet School attend?

Students who attend Catherine Kolnaski Magnet School usually go on to attend:

Middle : Groton Middle School
High : Robert E. Fitch High School

Rate Catherine Kolnaski Magnet 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 Connecticut Department of 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.