The brief
A private school in Smithtown, NY serving grades UG – UG.
It ranks 204 of 1,127 schools in New York.
Developmental Disabilities Institute is a private school: it enrolls by application and tuition, and its rating comes from the private-school model, which is not comparable with a public rating.
About this school's datarating: low confidence · 3 sources, 2019–2024
Every number on this page comes from a published source with a stated period. Where a source is partial, aging, an estimate, or describes a surrounding area rather than the school, that limitation is named here.
- Estimated academic score. This school does not have standardized test data. Based on NY statewide data. Learn more
- What this rating measures: classroom size, instructional time, student diversity, community resources, and school characteristics. Private schools are ranked against other private schools in NY.
- Component weights adjusted due to data availability.
Score basis: private school model. Data coverage: 80% of scoring components had data. Components scored: 4 of 5. Ranking pool: private schools in NY.
- School directory (enrollment, grades, staff, contact)
- NCES Private School Universe Survey (PSS) · SY 2023–24 · Low confidence
- Vintage not available. Do not use this measure alone.
- MySchoolScout rating and rank
- MySchoolScout ranking model · Low confidence
- Vintage not available. Do not use this measure alone.
- Available for part of the eligible units; results may not represent the full area.
- Derived as a weighted blend of the component scores shown in Academics from state assessment, EdFacts growth, and NCES resource records.
- Neighborhood (income, housing, education)
- U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates · Low confidence
- Older source: ACS 2019–2023 5-year estimates. Use as historical context.
- Reported for the ZCTA for ZIP 11787; this does not measure the attendance area.
Evidence periods: Rating mixed/unknown input periods; assessments vintage unavailable; directory SY 2023–24
The neighborhood
Where it sits, and what the area looks like.Open the New York school map to see school quality against home prices across the metro.
The area
- Median income
- $141,505
- Median home value
- $642,200
- Median rent
- $2,349/mo
- College educated
- 50.5%
- Homeownership
- 86.4%
- Poverty rate
- 5.3%
U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 11787; this is area context, not an attendance boundary.
Getting around
- Walk Score
- 21
- Car-Dependent
- Bike Score
- 26
- Somewhat Bikeable
Walk, transit and bike scores by
Programs and who goes here
What the campus offers, and who it enrolls.Who goes here
- White82%
- Hispanic6%
- Black5%
- Two or More3%
- Asian2%
- Native American2%
Enrollment mix: NCES Private School Universe Survey (PSS).
The record
What is on file, and where each number came from.Questions families ask
What grades does Developmental Disabilities Institute serve?
Developmental Disabilities Institute serves students in grades UG through UG.
How many students attend Developmental Disabilities Institute?
Developmental Disabilities Institute has an enrollment of approximately 101 students.
What is the student-teacher ratio at Developmental Disabilities Institute?
The student-teacher ratio at Developmental Disabilities Institute is 6.7:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.
How does Developmental Disabilities Institute rank in NY?
Developmental Disabilities Institute ranks #204 of 1,127 private schools in NY.
What is Developmental Disabilities Institute's MySchoolScout rating?
Developmental Disabilities Institute has a current MySchoolScout rating of 7.3 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
Is Developmental Disabilities Institute a private school?
Yes, Developmental Disabilities Institute is a private coeducational school with a Nonsectarian affiliation. Private schools are not required to participate in state standardized testing, so academic performance data may be limited compared to public schools.
Is Developmental Disabilities Institute a religious school?
No, Developmental Disabilities Institute is a nonsectarian (non-religious) private school.
School facts
- Grades
- UG – UG
- Enrollment
- 101
- Gender split
- 85% M / 15% F
- Student-teacher ratio
- 6.7:1
- Teachers (FTE)
- 15
- Type
- Private
- Coed status
- Coed
- Affiliation
- Nonsectarian
- School day
- 6 hours
- Days per year
- 210 days
- Setting
- Large Suburb
- County
- Suffolk County
- Phone
- (631) 366-2917
- Area population (ZIP 11787)
- 34,656
- Area average commute
- 32.6 min
- Area median age
- 46.9
NCES Private School Universe Survey (PSS) (SY 2023–24).
Related reading
- Best States for Public Schools in 2026: A Complete Rankingdata insights
- Charter Schools vs Public Schools: What the Data Actually Shows (2026)school choice
- The New School Choice Map: Is Your State Participating in the Federal Tuition Tax Credit?data insights
- Student-Teacher Ratio by State: Complete 2026 Rankingsdata insights
Data from NCES Common Core of Data, New York State Education Dept., and U.S. Census ACS for the 2023–24 school year. Rankings computed by MySchoolScout. See all data sources.