New York City's public school system, operated by the New York City Department of Education, is the largest in the world. More than 1.1 million students are taught in more than 1,700 public schools with a budget of nearly $25 billion. It contains several selective specialized schools, such as Stuyvesant High School, The Bronx High School of Science, and Brooklyn Technical High School. There are several charter schools that operate in the city, such as Success Academy Charter Schools and Public Prep. There are also approximately 900 additional privately run secular and religious schools in the city.