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William Sidney Mount Elementary School

Public PK, KG-6

 50 Dean Ln
       Stony Brook, NY  11790-2799

(631) 730-4300

District: Three Village Central School District

SchoolDigger Rank:
509th of 2,431 New York Elementary Schools

Per Pupil Expenditures:  $21,616 Help


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:  11.7 Help
Number of students:  470

Racial breakdown:

White:
60.9%
Asian:
21.7%
Hispanic:
11.1%
more

Free/discounted lunch recipients:  13.2% Help


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Performance Trends
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Compare Details William Sidney Mount Elementary School ranks better than 79.1% of elementary schools in New York. It also ranks 4th among 5 ranked elementary schools in the Three Village Central School District. (See more...)
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Compare Details In 2022 the calculated Average Standard Score was 76.14. (See more...)
Student Body
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Compare Details William Sidney Mount Elementary School has the smallest elementary school student body size in the Three Village Central School District. Racial makeup is: White (60.9%), Asian (21.7%), Hispanic (11.1%). (See more...)
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Compare Details 13.2% of students are receiving a free or discounted lunch. (See more...)
Teachers
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Compare Details The student/teacher ratio at William Sidney Mount Elementary School is 11.7. 2 elementary schools in the Three Village Central School District have better student/teacher ratios. (See more...)
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Compare William Sidney Mount Elementary School employs 40 full-time teachers.
Finance
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Compare Details The average total spent per student at William Sidney Mount Elementary School is $21,616. 2 elementary schools in the Three Village Central School District spend more per student.
Schooldigger 2022 Rankings:

William Sidney Mount Elementary School:

SchoolDigger ranks William Sidney Mount Elementary School 509th of 2431 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 103rd of 1103 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 SchoolDigger Rating
2006 86.29 81st 2206 96.3%
2007 84.08 167th 2219 92.5%
2008 83.33 172nd 2227 92.3%
2009 81.87 181st 2257 92.0%
2010 83.49 233rd 2263 89.7%
2011 86.34 185th 2286 91.9%
2012 83.85 259th 2320 88.8%
2013 89.82 159th 2325 93.2%
2014 88.36 177th 2345 92.5%
2015 93.38 69th 2352 97.1%
2016 94.16 55th 2366 97.7%
2017 84.63 276th 2386 88.4%
2018 84.48 278th 2395 88.4%
2019 83.72 343rd 2413 85.8%
2021 74.20 503rd 2201 77.1%
2022 76.14 511th 2434 79.0%
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 SchoolDigger Rating
2021 58.72 135th 454 70.3%
2022 53.18 346th 1027 66.3%
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 310th 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 SchoolDigger Rating
2019 67.57 502nd 2032 75.3%
2021 59.00 584th 1678 65.2%
2022 57.77 729th 2099 65.3%
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 SchoolDigger Rating
2018 82.15 313th 2338 86.6%
2019 80.24 390th 2357 83.5%
2021 72.78 446th 1955 77.2%
2022 68.41 675th 2401 71.9%
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 SchoolDigger Rating
2018 80.69 347th 2340 85.2%
2019 83.79 304th 2358 87.1%
2021 67.68 578th 1961 70.5%
2022 77.13 451st 2400 81.2%
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 SchoolDigger Rating
2018 62.14 253rd 601 57.9%
2019 73.24 129th 548 76.5%
2021 54.63 234th 430 45.6%
2022 63.30 278th 671 58.6%
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 SchoolDigger Rating
2018 74.70 294th 1408 79.1%
2019 72.30 365th 1338 72.7%
2021 70.82 337th 1224 72.5%
2022 58.40 567th 1399 59.5%
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.

William Sidney Mount Elementary School Test Scores
Tests: 
  
Grades: 
  
Years: 
  
Group by: 
District Scores:
State Scores:    
  
Subgroup: 
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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

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

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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Compare
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

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.

Immunization Rates

William Sidney Mount Elementary School

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Compare
YearCompletely ImmunizedReligious ExemptionMedical ExemptionPolioMeaslesMumpsRubellaDiphtheriaHepatitis BVaricella
201398.6%0.9%0.0%99.1%98.6%99.1%99.1%99.1%99.1%99.1%
201497.3%1.5%0.4%97.9%97.9%98.1%98.1%98.1%97.6%98.1%
201595.4%1.1%0.5%96.9%98.4%98.3%98.4%96.9%98.4%97.3%
201698.2%1.6%0.2%98.2%98.2%98.2%98.2%98.2%98.2%98.2%
201797.4%2.0%0.0%97.6%97.6%97.6%97.6%97.4%97.6%97.6%
201897.5%2.1%0.0%97.7%97.9%97.9%97.9%97.9%97.9%97.9%
201997.0%0.0%0.0%97.2%97.2%97.2%97.2%97.2%97.6%97.6%
202097.8%0.0%98.2%100.0%100.0%100.0%98.6%99.8%99.4%

Data source: New York State Department of Health
Finances

Per Pupil Expenditures for William Sidney Mount Elementary School

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YearExpenditures from Federal FundsExpenditures from State and Local FundsTotal Expenditures Per Pupil (All Funds)
2019 $172 (0.8%) $20,234 (99.2%) $20,405
2020 $178 (0.8%) $22,244 (99.2%) $22,422
2021 $223 (1.0%) $21,719 (99.0%) $21,943
2022 $304 (1.4%) $21,312 (98.6%) $21,616

Data source: New York Department of Education
Pre and Post Pandemic Data

Impact of COVID-19 on William Sidney Mount Elementary 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 343rd of 2413 Elementary schoolsRanks 511th of 2434 Elementary schools
 6.8%

Test Scores

% proficient
Pre-pandemic (2018-2019)		 % proficient
Pandemic (2021-2022)		 Change (%)
3rd Grade English Language Arts (William Sidney Mount Elementary School)7655.8
 20.2%
   3rd Grade English Language Arts (Three Village Central School District)7365.6
 7.4%
   3rd Grade English Language Arts (New York)5246.3
 5.7%
3rd Grade Math (William Sidney Mount Elementary School)8767.5
 19.5%
   3rd Grade Math (Three Village Central School District)8265.7
 16.3%
   3rd Grade Math (New York)5447.7
 6.3%
4th Grade English Language Arts (William Sidney Mount Elementary School)7554.9
 20.1%
   4th Grade English Language Arts (Three Village Central School District)7361.8
 11.2%
   4th Grade English Language Arts (New York)4841.5
 6.5%
4th Grade Math (William Sidney Mount Elementary School)7052.8
 17.2%
   4th Grade Math (Three Village Central School District)7567.5
 7.5%
   4th Grade Math (New York)5042.9
 7.1%
5th Grade English Language Arts (William Sidney Mount Elementary School)3248.3
 16.3%
   5th Grade English Language Arts (Three Village Central School District)5960.6
 1.6%
   5th Grade English Language Arts (New York)3837.7
 0.3%
5th Grade Math (William Sidney Mount Elementary School)5264.3
 12.3%
   5th Grade Math (Three Village Central School District)7457.2
 16.8%
   5th Grade Math (New York)4636.9
 9.1%
6th Grade English Language Arts (William Sidney Mount Elementary School)7977.8
 1.2%
   6th Grade English Language Arts (Three Village Central School District)8177.3
 3.7%
   6th Grade English Language Arts (New York)4756.6
 9.6%
6th Grade Math (William Sidney Mount Elementary School)8152.8
 28.2%
   6th Grade Math (Three Village Central School District)8067.5
 12.5%
   6th Grade Math (New York)4738.3
 8.7%

Student Body

Number of students
Pre-pandemic (2018-2019)		 Number of students
Pandemic (2020-2021)		 Change (%)
Total Students505455
 9.9%
African American55
American Indian00
Asian8385
 2.4%
Hispanic5044
 12%
Pacific Islander00
White342297
 13.2%
Two or More Races2524
 4%
% Free/Discounted Lunch Recipients11.3%12.3%
 1%

Schools Near William Sidney Mount Elementary School








Frequently Asked Questions about William Sidney Mount Elementary School

In the 2021-22 school year, 470 students attended William Sidney Mount Elementary School.

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

Students at William Sidney Mount Elementary School are 61% White, 22% Asian, 11% Hispanic, 4% Two or more races, 2% African American.

William Sidney Mount Elementary School ranks 509th of 2431 New York elementary schools. SchoolDigger rates this school 4 stars out of 5.


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SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau, the WNYC and the New York State Department of Health and the NY State Education Department. School Attendance Areas provided by ATTOM.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that school and district boundary data 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.




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