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Below Average

#4165 of 4,739 schools in NY

Thousand Islands High School

High School · THOUSAND ISLANDS CENTRAL SCHOOL DISTRICT

PO BOX 1000, Clayton, NY 13624

Enrollment

253

Student-Teacher

13.3:1

Score

4.5

Grades

9th – 12th

Updated 2022-23

How this school compares

In Clayton

#4 of 4

public schools

New York high schools

#1,091 of 1,160

In district

#4 of 4

THOUSAND ISLANDS CENTRAL SCHOOL DISTRICT

Academic performance

8.7 / 10

Exceptional

About Thousand Islands High School

THOUSAND ISLANDS HIGH SCHOOL is a regular public high school located in the rural community of Clayton, New York. The school serves students from ninth through twelfth grade and has an enrollment of 253 students with a student-teacher ratio of 13.3:1, ensuring that each student receives individual attention. With 19 full-time equivalent teachers, THOUSAND ISLANDS HIGH SCHOOL offers a supportive learning environment.

The school’s academic performance is noteworthy, with 81% of students proficient or above in ELA/Reading and an impressive 92% proficient or above in Math. According to MySchoolScout's rating system, the school scores a 6.8 out of 10 overall, placing it at the 70th percentile among New York’s schools with a strong academic score of 8.4 out of 10. This indicates that while there is room for improvement in certain areas, THOUSAND ISLANDS HIGH SCHOOL excels in math and provides a solid foundation for student development.

THOUSAND ISLANDS HIGH SCHOOL stands out as an integral part of the rural community, offering students a nurturing environment conducive to learning and personal growth.

What Parents Should Know

Located in a rural area, Thousand Islands High School may involve longer commutes for some families. Rural schools often serve as community anchors and may have smaller class sizes, but parents should consider transportation logistics, after-school program availability, and access to specialized services.

Score Breakdown

Full Profile · 4/4 metrics
Student Progress3.7Fair25%
Year-over-year improvement in student test scores.
View breakdown
Years of Data2
Annual Change-5.62 pts/yr
Data Period2019–2021
TrendDeclining
Academics8.7Excellent25%
Student proficiency on state tests, adjusted for community poverty levels.
View breakdown
Math Proficiency92%
Reading/ELA Proficiency69.5%
Overall Proficiency81%
Expected (poverty-adj.)62%
vs. Expected+19.1 pts
Adjusted Percentile81th
College Readiness2.3Needs Improvement30%
Graduation rates, AP course participation, and IB availability.
View breakdown
AP Participation5.1%
IB ProgramNo
Resources & Environment3.6Fair20%
Student-teacher ratio, per-pupil spending, and attendance.
View breakdown
Student-Teacher Ratio13.3:1
Per-Pupil Spending$21,541

Thousand Islands High School — Students at Thousand Islands High School score 81% proficient, which is above what's typical for similar communities (expected: 62%).

How we calculate scores →

Equity & Diversity

Shown separately, not included in overall score

Free/Reduced Lunch

41.1%

Students qualifying for federal meal assistance

Test Scores NY EDFACTS (2020-21)

Math Proficiency 92.0%
School
State
N/A
ELA Proficiency 80.8%
School
State
N/A

Based on 4 test records from NY state assessments. About our data

Proficiency Trend

↓ Declining

Average proficiency (% at or above grade level) across Math & ELA over time.

2019
Math
92%
ELA
92%
2021*
Math
92%
ELA
69.5%

* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.

Source: EdFacts (NCES) and state assessment data. Growth score: 3.7/10.

How Thousand Islands High School Compares

See how Thousand Islands High School performs across key quality dimensions compared to state benchmarks.

Overall Score
4.5/10
12th percentile in NY
Academic
8.7/10
8.7/10
Growth
3.7/10
Below average
Environment
3.6/10
Below average

Funding & Resources

Free/Reduced Lunch
Students eligible for subsidized meals
41%
Teaching Staff
13:1 student-teacher ratio
19 teachers

Location

PO BOX 1000, Clayton, NY 13624

Nearby Alternatives

Families considering Thousand Islands High School may also want to explore other high schools in the area. IMMACULATE HEART CENTRAL JR/SR HIGH SCHOOL (rated 6.0/10, 20.9 miles away, in nearby Watertown), which scores notably higher. Another option is ALEXANDRIA CENTRAL HIGH SCHOOL (rated 4.5/10, 17.5 miles away, in nearby Alexandria Bay), with a very similar rating. Additionally, GENERAL BROWN JUNIOR-SENIOR HIGH SCHOOL (rated 2.7/10, 15.2 miles away, in nearby Dexter), a more accessible option. For more schools in Clayton, see our Clayton schools guide .

Nearby Schools

20 within 21.6 mi
School Distance Rating
THOUSAND ISLANDS MIDDLE SCHOOL Clayton 0.0 mi 5.6
GUARDINO ELEMENTARY SCHOOL Clayton 6.6 mi 7.0
LYME CENTRAL SCHOOL Chaumont 9.4 mi 5.9
BASHAW ELEMENTARY SCHOOL Clayton 8.0 mi 7.7
GENESIS SCHOOL - CHRISTIAN LIFE CENTER Chaumont 10.1 mi
LA FARGEVILLE CENTRAL SCHOOL La Fargeville 11.6 mi 6.0
DEXTER ELEMENTARY SCHOOL Dexter 14.9 mi 3.8
GENERAL BROWN JUNIOR-SENIOR HIGH SCHOOL Dexter 15.2 mi 2.7
SACKETS HARBOR CENTRAL SCHOOL Sackets Harbor 17.7 mi 5.2
BROWNVILLE SCHOOL Brownville 17.5 mi 5.3
JEFFERSON-LEWIS-HAMILTON-HERKIMER-ONEIDA BOCES Watertown 19.1 mi 6.6
ALEXANDRIA CENTRAL ELEMENTARY SCHOOL Alexandria Bay 17.5 mi 7.3
ALEXANDRIA CENTRAL HIGH SCHOOL Alexandria Bay 17.5 mi 4.5
IHC INTERMEDIATE SCHOOL GRADES K-5 Watertown 20.6 mi 5.7
IMMACULATE HEART CENTRAL JR/SR HIGH SCHOOL Watertown 20.9 mi 6.0
NORTH ELEMENTARY SCHOOL Watertown 20.6 mi 5.2
SHERMAN SCHOOL Watertown 21.2 mi 5.0
STARBUCK ELEMENTARY SCHOOL Watertown 20.8 mi 3.8
IMMACULATE HEART ELEMENTARY SCHOOL GRADES Watertown 21.2 mi 5.9
CASE MIDDLE SCHOOL Watertown 21.6 mi 4.0

Neighborhood Census ACS (2019-2023)

Census data for ZIP 13624 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$79,167

Median Home Value

$224,000

Median Rent

$982/mo

Population

4,438

College Educated

31.4%

Homeownership

65.8%

Avg Commute

27.6 min

Poverty Rate

11.5%

Median Age

46

Community Profile

The community surrounding Thousand Islands High School has a median household income of $79,167. It is an area where 31% of adults hold a bachelor's degree or higher. The median home value in the area is $224,000, with a median rent of $982/month. The area has a poverty rate of 11.5%. The average commute for residents is 28 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.

Similar Schools

Schools in the same state with comparable level, size, and ratings

School Rating
ALEXANDRIA CENTRAL HIGH SCHOOL Alexandria Bay, NY 4.5
CONGREGATION PEER BAIS YAAKOV Monsey, NY 4.5
MAPLE GROVE JUNIOR/SENIOR HIGH SCHOOL Bemus Point, NY 4.5
ONTECH CHARTER HIGH SCHOOL Syracuse, NY 4.5
PORT BYRON SENIOR HIGH SCHOOL Port Byron, NY 4.5
YOUNG WOMEN'S COLLEGE PREP CS Rochester, NY 4.5

Frequently Asked Questions

Common questions about Thousand Islands High School

What grades does Thousand Islands High School serve?

Thousand Islands High School serves students in grades 9th through 12th.

How many students attend Thousand Islands High School?

Thousand Islands High School has an enrollment of approximately 253 students.

What is the student-teacher ratio at Thousand Islands High School?

The student-teacher ratio at Thousand Islands High School is 13.3:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.

How does Thousand Islands High School rank in NY?

Thousand Islands High School is ranked #4165 out of 4,739 schools in NY.

What is Thousand Islands High School's MySchoolScout rating?

Thousand Islands High School has a composite rating of 4.5 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.

What are the test scores at Thousand Islands High School?

Based on the most recent state assessment data, Thousand Islands High School has 92.0% math proficiency and 80.8% reading/ELA proficiency.

Is Thousand Islands High School a charter school?

No, Thousand Islands High School is not a charter school. It is a traditional public school operated by the local school district.

Is Thousand Islands High School a Title I school?

No, Thousand Islands High School is not currently a Title I school.

What does the Free & Reduced Lunch percentage mean for Thousand Islands High School?

41.1% of students at Thousand Islands High School qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.

11 schools nearby View map →

Neighborhood Context

County Safety
Low (128/100K)

FBI UCR 2024. County-level only. Data >1 year old.

Quick Facts NCES CCD (SY 2022-23)

Grades
9th – 12th
Enrollment
253
Student-Teacher Ratio
13.3:1
Teachers (FTE)
19
Free/Reduced Lunch
41.1%
Type
regular
Setting
Distant Rural
County
Jefferson County
Data Year
2023–2024

District

THOUSAND ISLANDS CENTRAL SCHOOL DISTRICT
District Enrollment
841
Schools in District
4
Per-Pupil Spending
$23,443
District Rank
#4 of 4

How We Rate Schools

Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.

Read our full methodology

Related reading

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