The United Nations International School (UNIS) is a private international school in New York City. It was founded in 1947 by families who worked for or were associated with the United Nations. The school was founded to provide an international education, while preserving its students' diverse cultural heritages. It includes a Kindergarten, elementary school (Junior school), junior high school (Middle school) and high school (Tutorial House, or Tut House). As of 2013, it has over 1,450 students representing over 100 countries. English is the main language of instruction.