Is Cos Cob School a good school?

Cos Cob School ranks 134 th of 490 Connecticut elementary schools. SchoolDigger rates this school 4 stars out of 5.

How many students attend Cos Cob School?

In the 2021-22 school year, 359 students attended Cos Cob School.

What is the racial makeup of Cos Cob School?

Students at Cos Cob School are 63% White, 19% Hispanic, 10% Asian, 9% Two or more races.

What schools do graduates of Cos Cob School attend?

Students who attend Cos Cob School usually go on to attend: Middle : Central Middle School High : Greenwich High School

Cos Cob School in Cos Cob CT

Performance Trends

Compare Details Cos Cob School ranks better than 72.7% of elementary schools in Connecticut. It also ranks 8^th among 11 ranked elementary schools in the Greenwich School District. (See more...)

Compare Details In 2022 the calculated Average Standard Score was 75.08. (See more...)

Student Body

Compare Details Racial makeup is: White (62.7%), Hispanic (18.7%), Asian (9.7%). (See more...)

Compare Details 15% of students are receiving a free or discounted lunch. (See more...)

Teachers

Compare Details The student/teacher ratio at Cos Cob School is 11.3. 6 elementary schools in the Greenwich School District have better student/teacher ratios. (See more...)

Compare Cos Cob School employs 31.6 full-time teachers.

Finance

Compare Details The average total spent per student at Cos Cob School is $24,060. 5 elementary schools in the Greenwich School District spend more per student.

Map and boundary of Cos Cob School

School Attendance Areas provided by ATTOM.

Schooldigger 2022 Rankings:

Cos Cob School:

SchoolDigger ranks Cos Cob School 134^th of 490 Connecticut public elementary schools. (See Cos Cob School in the ranking list.)

Greenwich School District:

SchoolDigger ranks Greenwich School District 35^th of 148 Connecticut school districts. (See district ranking list.)

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Your rating for Cos Cob School?

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Rank History for Cos Cob School

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Rank History for all students at Cos Cob School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CT State Percentile
2006	69.83	223^rd	570	60.9%
2007	70.65	223^rd	568	60.7%
2008	71.84	201^st	565	64.4%
2009	72.86	190^th	566	66.4%
2010	70.56	212^th	579	63.4%
2011	75.14	158^th	565	72.0%
2012	70.78	210^th	564	62.8%
2013	75.20	164^th	557	70.6%
2015	73.84	177^th	551	67.9%
2016	73.30	150^th	518	71.0%
2017	75.50	147^th	519	71.7%
2018	74.03	156^th	532	70.7%
2019	79.77	123^rd	522	76.4%
2021	81.73	110^th	538	79.6%
2022	75.08	134^th	490	72.7%

Rank History for Special Education students at Cos Cob School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CT State Percentile	SchoolDigger Rating
2021	85.57	32^nd	371	91.4%

Rank History for Female students at Cos Cob School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CT State Percentile
2018	65.81	109^th	259	57.9%
2019	66.17	100^th	242	58.7%
2021	79.98	93^rd	455	79.6%
2022	69.98	94^th	234	59.8%

Rank History for Male students at Cos Cob School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CT State Percentile
2018	67.38	111^th	262	57.6%
2021	76.91	109^th	445	75.5%
2022	69.60	93^rd	232	59.9%

Rank History for White students at Cos Cob School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CT State Percentile
2018	57.24	144^th	296	51.4%
2019	66.55	98^th	295	66.8%
2021	70.55	92^nd	327	71.9%
2022	64.47	105^th	252	58.3%

Data source: test scores: Connecticut Department of Education, rankings: SchoolDigger.com

Data source: Connecticut State Department of Education

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Enrollment information for Cos Cob School

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Year	White	African American	Asian	Hispanic	American Indian	Pacific Islander	Two or More Races	Total
1988	300	2	21	11	0	n/a	n/a	334
1989	311	2	34	8	0	n/a	n/a	355
1990	242	1	26	10	n/a	n/a	n/a	279
1991	219	0	48	5	0	n/a	n/a	272
1992	225	1	42	8	0	n/a	n/a	276
1993	227	2	40	15	0	n/a	n/a	284
1994	338	1	43	25	0	n/a	n/a	407
1995	378	3	61	35	0	n/a	n/a	477
1996	378	3	61	35	0	n/a	n/a	477
1997	369	4	62	42	0	n/a	n/a	477
1998	376	3	62	31	0	n/a	n/a	472
1999	386	4	68	28	0	n/a	n/a	486
2000	379	3	54	29	0	n/a	n/a	465
2001	361	3	67	19	0	n/a	n/a	450
2002	348	4	69	30	0	n/a	n/a	451
2003	348	4	69	30	0	n/a	n/a	451
2004	335	6	65	32	0	n/a	n/a	438
2005	324	7	61	39	1	n/a	n/a	432
2006	343	7	70	52	0	n/a	n/a	472
2007	301	4	70	46	1	n/a	n/a	422
2008	289	3	66	49	0	n/a	n/a	407
2009	300	3	67	45	0	n/a	n/a	415
2010	292	11	66	48	0	n/a	n/a	417
2011	285	12	53	55	0	0	13	418
2012	277	7	49	52	0	0	17	402
2013	305	11	45	52	0	0	21	434
2014	306	8	41	59	0	0	30	444
2015	283	6	48	68	0	0	33	438
2016	280	3	45	77	0	2	30	437
2017	280	2	48	86	0	0	30	446
2018	277	1	36	84	0	0	36	434
2019	258	1	35	82	0	0	35	411
2020	245	1	32	80	0	0	31	389
2021	235	1	34	65	0	0	27	362
2022	225	1	35	67	0	0	31	359

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Enrollment/Ethnicity

For more information about how the Department of Education defines ethnicity, see Defining Race and Ethnicity Data, National Center for Education Statistics

Students eligible for free or discounted lunch at Cos Cob School

Compare

Year	# Students	Full-time Teachers	Student/Teacher ratio	% Free/Discounted Lunch
1988	334	27.0	12.3	n/a
1989	355	31.2	11.3	n/a
1990	279	25.6	10.8	n/a
1991	272	20.2	13.4	n/a
1992	276	24.0	11.5	2.5
1993	284	22.8	12.5	0.4
1994	407	27.8	14.6	6.6
1995	477	28.0	17.0	6.1
1996	477	28.0	17.0	6.1
1997	477	34.2	13.9	3.1
1998	472	32.9	14.3	3.2
1999	486	36.8	13.2	5.8
2000	465	38.9	12.0	4.5
2001	450	37.4	12.0	n/a
2002	451	35.0	12.9	3.5
2003	451	35.0	12.9	3.5
2004	438	34.9	12.6	4.3
2005	432	30.0	14.4	n/a
2006	472	29.8	15.8	2.1
2007	422	27.6	15.3	5
2008	407	31.6	12.9	4.9
2009	415	34.2	13.7	4.8
2010	417	34.1	12.2	7.4
2011	418	35.1	11.9	8.9
2012	402	34.1	11.7	9.7
2013	434	36.1	12.0	9.4
2014	444	35.4	12.5	9.2
2015	438	35.0	12.5	9.4
2016	437	33.0	13.2	9.4
2017	446	36.5	12.2	11.9
2018	434	37.8	11.4	12.7
2019	411	35.1	11.7	17.5
2020	389	33.0	11.7	16.5
2021	362	31.1	11.6	17.1
2022	359	31.6	11.3	15

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Students eligible for discounted/free lunch

For information about the National School Lunch Program, see the USDA Website

Student/Teacher Ratio Cos Cob School

Compare

Year	# Students	Full-time Teachers	Student/Teacher ratio	% Free/Discounted Lunch
1988	334	27.0	12.3	n/a
1989	355	31.2	11.3	n/a
1990	279	25.6	10.8	n/a
1991	272	20.2	13.4	n/a
1992	276	24.0	11.5	2.5
1993	284	22.8	12.5	0.4
1994	407	27.8	14.6	6.6
1995	477	28.0	17.0	6.1
1996	477	28.0	17.0	6.1
1997	477	34.2	13.9	3.1
1998	472	32.9	14.3	3.2
1999	486	36.8	13.2	5.8
2000	465	38.9	12.0	4.5
2001	450	37.4	12.0	n/a
2002	451	35.0	12.9	3.5
2003	451	35.0	12.9	3.5
2004	438	34.9	12.6	4.3
2005	432	30.0	14.4	n/a
2006	472	29.8	15.8	2.1
2007	422	27.6	15.3	5
2008	407	31.6	12.9	4.9
2009	415	34.2	13.7	4.8
2010	417	34.1	12.2	7.4
2011	418	35.1	11.9	8.9
2012	402	34.1	11.7	9.7
2013	434	36.1	12.0	9.4
2014	444	35.4	12.5	9.2
2015	438	35.0	12.5	9.4
2016	437	33.0	13.2	9.4
2017	446	36.5	12.2	11.9
2018	434	37.8	11.4	12.7
2019	411	35.1	11.7	17.5
2020	389	33.0	11.7	16.5
2021	362	31.1	11.6	17.1
2022	359	31.6	11.3	15

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Student-Teacher Ratio

Student/teacher ratio is calculated by dividing the total number of students by the total number of full-time equivalent teachers. Please note that a smaller student/teacher ratio does not necessarily translate to smaller class size. In some instances, schools hire teachers part time, and some teachers are hired for specialized instruction with very small class sizes. These and other factors contribute to the student/teacher ratio. Note: For private schools, Student/teacher ratio may not include Pre-Kindergarten.

Finances

Per Pupil Expenditures for Cos Cob School

Year	Total Expenditures Per Pupil
2018	$20,112
2019	$22,254
2020	$21,997
2021	$24,060

Data source: Connecticut Department of Education

Pre and Post Pandemic Data

Impact of COVID-19 on Cos Cob School

The coronavirus has had a profound impact on education in America. Learning shifted online overnight, attendance numbers dwindled, and enrollment decreased. SchoolDigger.com is making it easier for you to better assess how COVID-19 has impacted your school. Through the collection of pre-pandemic (2019) and current data, SchoolDigger.com is sharing test scores, enrollment numbers and school demographics from schools across the country – and we make it easy to see how impacted schools compare locally and statewide.

Rankings

Rank Pre-pandemic (2018-2019)	Rank Pandemic (2021-2022)	Change (%)
Ranks 123^rd of 522 Elementary schools	Ranks 134^th of 490 Elementary schools	3.8%

Test Scores

	% proficient Pre-pandemic (2018-2019)	% proficient Pandemic (2021-2022)	Change (%)
3rd Grade English Language Arts (Cos Cob School)	71.9	58.8	13.1%
3rd Grade English Language Arts (Greenwich School District)	74.8	77.3	2.5%
3rd Grade English Language Arts (Connecticut)	54.3	46.7	7.6%
3rd Grade Mathematics (Cos Cob School)	76.9	72.1	4.8%
3rd Grade Mathematics (Greenwich School District)	76	78.1	2.1%
3rd Grade Mathematics (Connecticut)	55	47.4	7.6%
4th Grade Mathematics (Cos Cob School)	69.4	55.6	13.8%
4th Grade Mathematics (Greenwich School District)	75.9	66.4	9.5%
4th Grade Mathematics (Connecticut)	52.5	40.3	12.2%
5th Grade English Language Arts (Cos Cob School)	71.6	73.5	1.9%
5th Grade English Language Arts (Greenwich School District)	82.5	76.4	6.1%
5th Grade English Language Arts (Connecticut)	58.1	51.9	6.2%
5th Grade Mathematics (Cos Cob School)	76.5	50	26.5%
5th Grade Mathematics (Greenwich School District)	71.1	64.8	6.3%
5th Grade Mathematics (Connecticut)	46.5	38.8	7.7%

Student Body

	Number of students Pre-pandemic (2018-2019)	Number of students Pandemic (2020-2021)	Change (%)
Total Students	411	362	11.9%
African American	1	1
American Indian	0	0
Asian	35	34	2.9%
Hispanic	82	65	20.7%
Pacific Islander	0	0
White	258	235	8.9%
Two or More Races	35	27	22.9%
% Free/Discounted Lunch Recipients	17.5%	17.1%	0.4%

Cos Cob School

Cos Cob School:

Greenwich School District:

What do you think?

Rank History for Cos Cob School

Rank History for all students at Cos Cob School

Rank History for Special Education students at Cos Cob School

Rank History for Female students at Cos Cob School

Rank History for Male students at Cos Cob School

Rank History for White students at Cos Cob School

Enrollment information for Cos Cob School

Students eligible for free or discounted lunch at Cos Cob School

Student/Teacher Ratio Cos Cob School

Per Pupil Expenditures for Cos Cob School

Impact of COVID-19 on Cos Cob School

Rankings

Test Scores

Student Body

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