Is William Sidney Mount Elementary School a good school?

William Sidney Mount Elementary School ranks 574 th of 2439 New York elementary schools. SchoolDigger rates this school 4 stars out of 5.

How many students attend William Sidney Mount Elementary School?

In the 2022-23 school year, 511 students attended William Sidney Mount Elementary School.

What is the racial makeup of William Sidney Mount Elementary School?

Students at William Sidney Mount Elementary School are 59% White, 23% Asian, 12% Hispanic, 5% Two or more races, 2% African American.

What schools do graduates of William Sidney Mount Elementary School attend?

Students who attend William Sidney Mount Elementary School usually go on to attend: Middle : Robert Cushman Murphy Junior High School High : Ward Melville Senior High School

William Sidney Mount Elementary School

Summary:

William Sidney Mount Elementary School is a public elementary school in Stony Brook, New York, serving grades PK-6 with a total enrollment of 511 students. The school is part of the Three Village Central School District, which is ranked 108 out of 866 school districts in New York and has a 4-star rating from SchoolDigger.

William Sidney Mount Elementary School consistently performs above the state average in both English Language Arts (ELA) and Math assessments across all grade levels. In 2022-2023, the school's proficiency rates ranged from 52.63% to 62.79% in ELA and 59.57% to 76.19% in Math, compared to the state averages of 44.89% to 48.79% in ELA and 48.07% to 53.85% in Math. The school has a relatively diverse student population, with a racial makeup of 58.71% White, 12.33% Hispanic, 22.5% Asian, and 1.76% African American. Additionally, the school has a higher spending per student of $20,772, compared to the state average, and a lower student-teacher ratio of 12.1.

When compared to other elementary schools in the Three Village Central School District, William Sidney Mount Elementary School generally outperforms its peers in academic assessments, particularly in Math. However, the nearby Minnesauke Elementary School and Nassakeag Elementary School also demonstrate strong academic performance, ranking in the top 10% of New York elementary schools. The school's consistent high performance, diverse student population, and favorable resource allocation contribute to its success and make it a model for other schools in the region.

Detail:

Public PK, KG-6

50 Dean Ln
Stony Brook, NY 11790-2799

(631) 730-4300

District: Three Village Central School District

SchoolDigger Rank:
574^th of 2,439 New York Elementary Schools

Per Pupil Expenditures: $20,772

Students who attend William Sidney Mount Elementary School usually attend:

Middle:	Robert Cushman Murphy Junior High School
High:	Ward Melville Senior High School

Student/teacher ratio: 12.1

Number of students: 511

Racial breakdown:

White:

58.7%

Asian:

22.5%

Hispanic:

12.3%

Free/discounted lunch recipients: 17.2%

See top rated New York elementary schools

Compare William Sidney Mount Elementary School to nearby elementary schools!

Performance Trends

Compare Details William Sidney Mount Elementary School ranks better than 76.5% of elementary schools in New York. It also ranks 4^th among 5 ranked elementary schools in the Three Village Central School District. (See more...)

Compare Details In 2023 the calculated Average Standard Score was 74.73. (See more...)

Student Body

Compare Details William Sidney Mount Elementary School has the smallest elementary school student body size in the Three Village Central School District. Student population at William Sidney Mount Elementary School is diverse. Racial makeup is: White (58.7%), Asian (22.5%), Hispanic (12.3%). (See more...)

Compare Details 17.2% of students are receiving a free or discounted lunch. (See more...)

Compare Details (See more...)

Teachers

Compare Details The student/teacher ratio at William Sidney Mount Elementary School is 12.1. 2 elementary schools in the Three Village Central School District have better student/teacher ratios. (See more...)

Compare William Sidney Mount Elementary School employs 41.9 full-time teachers.

Finance

Compare Details The average total spent per student at William Sidney Mount Elementary School is $20,772, which is the lowest among 5 elementary schools in the Three Village Central School District!

Schooldigger 2023 Rankings:

William Sidney Mount Elementary School:

SchoolDigger ranks William Sidney Mount Elementary School 574^th of 2439 New York public elementary schools. (See William Sidney Mount Elementary School in the ranking list.)

Elementary School Test Score Ratings by Student Subgroup:

English Language Learner students:

Low Socio Economic Status students:

Female students:

Male students:

Asian students:

White students:

Three Village Central School District:

SchoolDigger ranks Three Village Central School District 108^th of 866 New York school districts. (See district ranking list.)

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Rank History for William Sidney Mount Elementary School

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Rank History for all students at William Sidney Mount Elementary School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	NY State Percentile
2006	86.29	81^st	2206	96.3%
2007	84.08	167^th	2219	92.5%
2008	83.33	172^nd	2227	92.3%
2009	81.87	181^st	2257	92.0%
2010	83.49	233^rd	2263	89.7%
2011	86.34	185^th	2286	91.9%
2012	83.85	259^th	2320	88.8%
2013	89.82	159^th	2325	93.2%
2014	88.36	177^th	2345	92.5%
2015	93.38	69^th	2352	97.1%
2016	94.16	55^th	2366	97.7%
2017	84.63	276^th	2386	88.4%
2018	84.48	278^th	2395	88.4%
2019	83.72	343^rd	2413	85.8%
2021	74.20	503^rd	2201	77.1%
2022	76.14	511^th	2434	79.0%
2023	74.73	574^th	2439	76.5%

See the entire list of New York Elementary School Rankings!

Rank History for English Language Learner students at William Sidney Mount Elementary School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	NY State Percentile
2021	58.72	135^th	454	70.3%
2022	53.18	346^th	1027	66.3%
2023	45.16	466^th	1001	53.4%

See the entire list of Best New York Elementary Schools for English Language Learner Students!

Rank History for Special Education students at William Sidney Mount Elementary School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	NY State Percentile	SchoolDigger Rating
2018	70.82	310^th	1941	84.0%

See the entire list of Best New York Elementary Schools for Special Education Students!

Rank History for Low Socio Economic Status students at William Sidney Mount Elementary School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	NY State Percentile
2019	67.57	502^nd	2032	75.3%
2021	59.00	584^th	1678	65.2%
2022	57.77	729^th	2099	65.3%
2023	48.70	929^th	2041	54.5%

See the entire list of Best New York Elementary Schools for Low Socio Economic Status Students!

Rank History for Female students at William Sidney Mount Elementary School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	NY State Percentile
2018	82.15	313^th	2338	86.6%
2019	80.24	390^th	2357	83.5%
2021	72.78	446^th	1955	77.2%
2022	68.41	675^th	2401	71.9%
2023	75.31	528^th	2403	78.0%

See the entire list of Best New York Elementary Schools for Female Students!

Rank History for Male students at William Sidney Mount Elementary School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	NY State Percentile
2018	80.69	347^th	2340	85.2%
2019	83.79	304^th	2358	87.1%
2021	67.68	578^th	1961	70.5%
2022	77.13	451^st	2400	81.2%
2023	68.98	676^th	2400	71.8%

See the entire list of Best New York Elementary Schools for Male Students!

Rank History for Asian students at William Sidney Mount Elementary School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	NY State Percentile
2018	62.14	253^rd	601	57.9%
2019	73.24	129^th	548	76.5%
2021	54.63	234^th	430	45.6%
2022	63.30	278^th	671	58.6%
2023	52.99	329^th	605	45.6%

See the entire list of Best New York Elementary Schools for Asian Students!

Rank History for White students at William Sidney Mount Elementary School

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	NY State Percentile
2018	74.70	294^th	1408	79.1%
2019	72.30	365^th	1338	72.7%
2021	70.82	337^th	1224	72.5%
2022	58.40	567^th	1399	59.5%
2023	62.25	508^th	1337	62.0%

See the entire list of Best New York Elementary Schools for White Students!

Data source: test scores: NY State Education Department, rankings: SchoolDigger.com

As you review the school rankings data, please be aware that some of the information from certain demographics is missing. The reason for this omission is that the data has been redacted from the source data itself due to low population samples in these specific demographic groups.

Redacting data from low population samples is a necessary step to ensure the reliability and accuracy of the results, as small sample sizes may not be representative of the broader population. Additionally, this measure helps protect the privacy of individuals belonging to these demographic groups.

Data source: NY State Education Department

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Enrollment information for William Sidney Mount Elementary School

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Year	White	African American	Asian	Hispanic	American Indian	Pacific Islander	Two or More Races	Not Specified	Total
1989	635	9	50	0	0	n/a	n/a	0	694
1990	568	13	56	7	2	n/a	n/a	0	646
1991	555	17	36	6	0	n/a	n/a	0	614
1992	616	16	49	5	0	n/a	n/a	0	686
1993	615	17	61	10	0	n/a	n/a	0	703
1994	650	15	51	10	0	n/a	n/a	0	726
1995	660	10	71	14	0	n/a	n/a	0	755
1996	660	10	71	14	0	n/a	n/a	0	755
1997	725	8	75	8	0	n/a	n/a	0	816
1998	743	12	84	15	1	n/a	n/a	0	855
1999	753	12	79	16	1	n/a	n/a	0	861
2000	773	22	101	10	0	n/a	n/a	0	906
2001	746	18	108	7	2	n/a	n/a	0	881
2002	738	20	100	13	4	n/a	n/a	0	875
2003	738	20	100	13	4	n/a	n/a	0	875
2004	718	19	112	15	10	n/a	n/a	0	874
2005	757	11	112	11	5	n/a	n/a	0	896
2006	747	9	126	22	5	n/a	n/a	0	909
2007	662	9	137	28	25	n/a	n/a	0	861
2008	698	15	111	13	9	n/a	n/a	0	846
2009	665	8	105	26	1	n/a	n/a	1	806
2010	630	10	103	22	2	n/a	n/a	4	771
2011	608	13	79	21	2	0	0	0	723
2012	581	14	82	25	2	0	1	0	705
2013	558	14	84	32	1	0	5	0	694
2014	514	14	96	40	1	0	10	0	675
2015	467	10	104	38	1	0	11	0	631
2016	399	6	95	36	1	0	18	0	555
2017	355	8	80	39	1	0	22	0	505
2018	340	4	67	42	0	0	23	0	476
2019	342	5	83	50	0	0	25	0	505
2020	317	5	86	46	2	1	22	0	479
2021	297	5	85	44	0	0	24	0	455
2022	286	9	102	52	0	0	21	0	470
2023	300	9	115	63	0	0	24	0	511

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 William Sidney Mount Elementary School

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Year	# Students	Full-time Teachers	Student/Teacher ratio	% Free/Discounted Lunch
1989	694	45.7	15.1	n/a
1990	646	48.3	13.3	n/a
1991	614	44.5	13.7	n/a
1992	686	43.5	15.7	n/a
1993	703	44.7	15.7	n/a
1994	726	44.7	16.2	1.7
1995	755	43.9	17.2	1.7
1996	755	43.9	17.2	1.7
1997	816	50.2	16.3	2.3
1998	855	55.4	15.4	1.8
1999	861	56.0	15.4	1.4
2000	906	54.7	16.6	1.7
2001	881	57.0	15.5	1.8
2002	875	57.1	15.3	2.5
2003	875	57.1	15.3	2.5
2004	874	n/a	n/a	n/a
2005	896	57.8	15.5	2.2
2006	909	57.0	15.9	2.5
2007	861	53.5	16.1	2.8
2008	846	53.5	15.8	1.4
2009	806	55.9	14.4	3.2
2010	771	53.9	14.3	4
2011	723	54.9	13.1	2.9
2012	705	47.5	14.8	5
2013	694	47.5	14.6	6.2
2014	675	39.0	17.3	8.3
2015	631	41.0	15.3	7.1
2016	555	36.0	15.4	4.7
2017	505	33.0	15.2	8.5
2018	476	32.0	14.8	0
2019	505	40.0	12.6	11.3
2020	479	42.0	11.4	10.6
2021	455	38.9	11.6	12.3
2022	470	40.0	11.7	13.2
2023	511	41.9	12.1	17.2

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

About Students eligible for discounted/free lunch:

The National School Lunch Program (NSLP) provides low-cost or free meals to students in U.S. public and nonprofit private schools based on household income. Those with incomes below 130% of the poverty line receive free lunch, while those between 130% and 185% qualify for reduced-price lunch. The percentage of students receiving free or reduced-price lunch serves as a marker for poverty, as it reflects the socioeconomic status of families in a given school or district. A higher FRPL rate typically indicates a higher concentration of low-income families, suggesting that the school or district may face additional challenges in providing adequate resources and support for student success.

Student/Teacher Ratio William Sidney Mount Elementary School

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Year	# Students	Full-time Teachers	Student/Teacher ratio	% Free/Discounted Lunch
1989	694	45.7	15.1	n/a
1990	646	48.3	13.3	n/a
1991	614	44.5	13.7	n/a
1992	686	43.5	15.7	n/a
1993	703	44.7	15.7	n/a
1994	726	44.7	16.2	1.7
1995	755	43.9	17.2	1.7
1996	755	43.9	17.2	1.7
1997	816	50.2	16.3	2.3
1998	855	55.4	15.4	1.8
1999	861	56.0	15.4	1.4
2000	906	54.7	16.6	1.7
2001	881	57.0	15.5	1.8
2002	875	57.1	15.3	2.5
2003	875	57.1	15.3	2.5
2004	874	n/a	n/a	n/a
2005	896	57.8	15.5	2.2
2006	909	57.0	15.9	2.5
2007	861	53.5	16.1	2.8
2008	846	53.5	15.8	1.4
2009	806	55.9	14.4	3.2
2010	771	53.9	14.3	4
2011	723	54.9	13.1	2.9
2012	705	47.5	14.8	5
2013	694	47.5	14.6	6.2
2014	675	39.0	17.3	8.3
2015	631	41.0	15.3	7.1
2016	555	36.0	15.4	4.7
2017	505	33.0	15.2	8.5
2018	476	32.0	14.8	0
2019	505	40.0	12.6	11.3
2020	479	42.0	11.4	10.6
2021	455	38.9	11.6	12.3
2022	470	40.0	11.7	13.2
2023	511	41.9	12.1	17.2

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.

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