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Developmental Disabilities Institute

99 Hollywood Dr
Smithtown, NY 11787
At Development Disabilities Institute, The Children's Day Services is a division of Developmental Disabilities Institute, operates a state approved full day (6 hour) special education program for students between 5 and 21 years of age.
The program is specifically designed for those students who display evidence of Autism or Pervasive Developmental Disorder.
There are currently over 190 students receiving educational services in this program.
In addition to providing a highly structured learning experience, the program also offers speech/language services, adaptive physical education, occupational and physical therapy, clinical, and vocational services and intensive parent training programs.
The primary goal of Children's Day Services is to teach all of our students the communicative, learning, social and vocational skills necessary for successful participation at home, school, and in various community settings.

Quick Facts (2026)

  • Top-Ranked NY School
  • School Type: Special Education School
  • Grades: Prekindergarten
  • Enrollment: 1,379 students
  • Yearly Tuition: $45,000
  • Acceptance rate: 75%
  • Application Deadline: None / Rolling
  • Source: National Center for Education Statistics (NCES)

Top Rankings

Developmental Disabilities Institute ranks among the top 20% of private schools in New York for:

Category
Attribute
Student Body

School Overview

Religious Affiliation
Grades Offered
Grades Prekindergarten
Year Founded
1961
School Calendar
Last Day of School
Tue. Jun 30, 2026

Student Body

Total Students
1,379 students
Student Body Type
Co-ed
% Students of Color
18%
State avg.: 40%

Academics and Faculty

Total Classroom Teachers
84 teachers
Student-Teacher Ratio
16:1
National avg.:

Tuition and Acceptance Rate

Admission Deadline
None / Rolling
Yearly Tuition Cost
Acceptance Rate
75%
National avg.: 82%

School Notes

  • At Development Disabilities Institute, The Children's Day Services is a division of Developmental Disabilities Institute, operates a state approved full day (6 hour) special education program for students between 5 and 21 years of age. The program is specifically designed for those students who display evidence of Autism or Pervasive Developmental Disorder. There are currently over 190 students receiving educational services in this program. In addition to providing a highly structured learning experience, the program also offers speech/language services, adaptive physical education, occupational and physical therapy, clinical, and vocational services and intensive parent training programs. The primary goal of Children's Day Services is to teach all of our students the communicative, learning, social and vocational skills necessary for successful participation at home, school, and in various community settings.
Source: National Center for Education Statistics (NCES)

Frequently Asked Questions

How much does Developmental Disabilities Institute cost?
Developmental Disabilities Institute's tuition is approximately $45,000 for private students.
What is the acceptance rate of Developmental Disabilities Institute?
The acceptance rate of Developmental Disabilities Institute is 75%, which is lower than the national average of 76%.
What is Developmental Disabilities Institute's ranking?
Developmental Disabilities Institute ranks among the top 20% of private schools in New York for: Largest student body.
When is the application deadline for Developmental Disabilities Institute?
The application deadline for Developmental Disabilities Institute is rolling (applications are reviewed as they are received year-round).

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Quick Facts (2026)

  • Top-Ranked NY School
  • School Type: Special Education School
  • Grades: Prekindergarten
  • Enrollment: 1,379 students
  • Yearly Tuition: $45,000
  • Acceptance rate: 75%
  • Application Deadline: None / Rolling
  • Source: National Center for Education Statistics (NCES)

Did You Know?

The average private school tuition in Suffolk County, NY is $20,396 for elementary schools and $26,278 for high schools (read more about average private school tuition across the country).
The average acceptance rate in Suffolk County, NY is 73% (read more about average acceptance rates across the country).

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