MITA was established in 1966 when Longwood School District was called Middle Island Central School District #12.
An NYSUT local, representing 840 members comprised of teachers, teaching assistants and nurses, MITA covers a large area in central Suffolk County, Long Island, NY. MITA members are spread out over the 7 following schools
- Longwood High School
- Longwood Junior High School
- Middle School
- Charles E. Walters
- Coram
- Ridge
- West Middle Island