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NYHighCalendar available · 31 events · Auto-updating

ROBERT M GRABLE JR MOUNT SINAI HIGH SCHOOL — School Calendar 2026-27

High|MOUNT SINAI, New York|MOUNT SINAI UNION FREE SCHOOL DISTRICT

MOUNT SINAI, NY 11766

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Upcoming Events

Sep

8

Tue

First Day of School (Mount Sinai)Event

Confirm bus route and pickup time. Early dismissal may apply.

Sep

21

Mon

Yom Kippur — No SchoolEvent

Mount Sinai School District school holiday

Sep

21

Mon

Yom Kippur — No SchoolEvent

Mount Sinai School District school holiday

Oct

12

Mon

Columbus Day — No SchoolEvent

Mount Sinai School District school holiday

Oct

12

Mon

Columbus Day — No SchoolEvent

Mount Sinai School District school holiday

Nov

11

Wed

Veteran's Day — No SchoolEvent

Mount Sinai School District school holiday

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School Profile

Grades

9–12

Enrollment

700

Student:Teacher

11.9:1

Locale

Suburban

District

MOUNT SINAI UNION FREE SCHOOL DISTRICT

Econ. Disadvantaged

11.6%

Phone

School Statistics

Academics (SY 2020-21)

Math Proficiency

>=95%

Graduation Rate

>=95%

Chronic Absenteeism

13.8%

SY 2019-20

Programs & Activities (SY 2021-22)

AP Program

20 courses offered

260 students enrolled

Dual Enrollment

266 students enrolled

SAT/ACT

199 test takers

Athletics

23 sports, 36 teams

683 participants

Student-Teacher Ratio: 11.8:1

Near average in NY

Technology & Internet Access (SY 2021-22)

1:1 Devices

Student devices available

Wi-Fi

Campus-wide wireless

Fiber Internet

High-speed connection

762

Connected devices

Staff & Support Services (SY 2021-22)

Teachers (FTE)

60

100% fully certified

Counselors

5

Psychologists

1.33

Social Workers

1

Nurses

1.33

Security Staff

2

Anti-Bullying Policy

District Finance (FY 2023)

Per-Pupil Spending

$29,270

Total current expenditure

Instruction Spending

$19,442

Per pupil, classroom only

Total Revenue/Pupil

$31,912

All funding sources

Funding Sources

Federal 3%State 34%Local 64%

District-level data from NCES F-33 Survey

Community Context

Median Home Value

$456,345

+4.2% 1yr+45.0% 5yr

Hudson, NY metro area

Community Need Level

Moderate

CDC/ATSDR Social Vulnerability Index 2022

Neighborhood Indicators (Census Tract)

10.6%

Below 150% poverty line

4.8%

Unemployment rate

4.4%

Uninsured residents

9.7%

No HS diploma (25+)

Special Education (IDEA)

District-level data from IDEA Part B · Students ages 3-21 served under IDEA

Total Students Served

361

Ages 3-21 under IDEA

School-Age (6-21)

327

Receiving special ed services

Est. % of Enrollment

47%

District rate, school may vary

Disability Categories (District)

Speech/Language Impairment

112 (34%)

Specific Learning Disability

94 (29%)

Other Health Impairment

60 (18%)

Autism

40 (12%)

Emotional Disturbance

10 (3%)

Source: U.S. Department of Education, IDEA Section 618 Data · District-level counts · Individual school figures may differ

Enrollment Trend (2014-2025)

710

Current enrollment

Declining(-11% 5yr)

Coming Up

Tue, Sep 8, 2026

First Day of School (Mount Sinai)

Event

Mon, Sep 21, 2026

Yom Kippur — No School

Event

Mon, Sep 21, 2026

Yom Kippur — No School

Event

Full School Calendar 2026-27

Date	Event	Type	Level
Tue, Sep 8, 2026	First Day of School (Mount Sinai) Mount Sinai School District 2026-2027 school year begins	Event	—
Mon, Sep 21, 2026	Yom Kippur — No School Mount Sinai School District school holiday	Event	—
Mon, Sep 21, 2026	Yom Kippur — No School Mount Sinai School District school holiday	Event	—
Mon, Oct 12, 2026	Columbus Day — No School Mount Sinai School District school holiday	Event	—
Mon, Oct 12, 2026	Columbus Day — No School Mount Sinai School District school holiday	Event	—
Wed, Nov 11, 2026	Veteran's Day — No School Mount Sinai School District school holiday	Event	—
Wed, Nov 11, 2026	Veteran's Day — No School Mount Sinai School District school holiday	Event	—
Wed, Nov 25, 2026	Thanksgiving Recess — No School Mount Sinai School District Thanksgiving Recess	Break	—
Wed, Nov 25, 2026	Thanksgiving Recess — No School Mount Sinai School District Thanksgiving Recess	Break	—
Thu, Dec 24, 2026	Winter Recess — No School Mount Sinai School District Winter Recess	Break	—
Thu, Dec 24, 2026	Winter Recess — No School Mount Sinai School District Winter Recess	Break	—
Mon, Jan 18, 2027	Martin Luther King Jr. — No School Mount Sinai School District school holiday	Event	—
Mon, Jan 18, 2027	Martin Luther King Jr. — No School Mount Sinai School District school holiday	Event	—
Mon, Feb 15, 2027	Mid-Winter Recess — No School Mount Sinai School District Mid-Winter Recess	Break	—
Mon, Feb 15, 2027	Mid-Winter Recess — No School Mount Sinai School District Mid-Winter Recess	Break	—
Fri, Mar 26, 2027	Spring Recess 1 - Easter — No School Mount Sinai School District school holiday	Break	—
Fri, Mar 26, 2027	Spring Recess 1 - Easter — No School Mount Sinai School District school holiday	Break	—
Mon, Mar 29, 2027	Spring Recess 1 - Easter — No School Mount Sinai School District school holiday	Break	—
Mon, Mar 29, 2027	Spring Recess 1 - Easter — No School Mount Sinai School District school holiday	Break	—
Mon, Apr 19, 2027	Spring Recess 2 - Passover — No School Mount Sinai School District Spring Recess 2 - Passover	Break	—
Mon, Apr 19, 2027	Spring Recess 2 - Passover — No School Mount Sinai School District Spring Recess 2 - Passover	Break	—
Mon, May 17, 2027	Unused Snow Day (If needed) (Mount Sinai School District) Mount Sinai School District important calendar date	Event	—
Mon, May 17, 2027	Unused Snow Day (If needed) (Mount Sinai School District) Mount Sinai School District important calendar date	Event	—
Thu, May 27, 2027	Unused Snow Day (If needed) (Mount Sinai School District) Mount Sinai School District important calendar date	Event	—
Thu, May 27, 2027	Unused Snow Day (If needed) (Mount Sinai School District) Mount Sinai School District important calendar date	Event	—
Fri, May 28, 2027	Unused Snow Day (If needed) (Mount Sinai School District) Mount Sinai School District important calendar date	Event	—
Fri, May 28, 2027	Unused Snow Day (If needed) (Mount Sinai School District) Mount Sinai School District important calendar date	Event	—
Mon, May 31, 2027	Memorial Day — No School Mount Sinai School District school holiday	Holiday	—
Mon, May 31, 2027	Memorial Day — No School Mount Sinai School District school holiday	Holiday	—
Fri, Jun 25, 2027	Last Day of School (Mount Sinai) Mount Sinai School District 2026-2027 school year ends	Event	—
Fri, Jun 25, 2027	Last Day of School (Mount Sinai) Mount Sinai School District 2026-2027 school year ends	Event	—

Showing 31 events for the 2026-27 school year

Frequently Asked Questions about ROBERT M GRABLE JR MOUNT SINAI HIGH SCHOOL

ROBERT M GRABLE JR MOUNT SINAI HIGH SCHOOL currently enrolls 700 students across High grade levels. The school operates under the local school district in NY.

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School profiles: Data from NCES Common Core of Data. Calendar events from district calendar sources, updated automatically. · How we verify this data