Education in New York City is provided by a vast number of public and private institutions. New York City has the largest educational system of any city in the world. The city’s educational infrastructure spans primary education, secondary education, higher education, and research. New York City is home to some of the most important libraries, universities, and research centers in the world. In 2006, New York had the most post-graduate life sciences degrees awarded annually in the United States, 40,000 licensed physicians, and 127 Nobel laureates with roots in local institutions. The city receives the second-highest amount of annual funding from the National Institutes of Health among all U.S. cities. It also struggles with disparity in its public school system, with some of the best-performing public schools in the United States as well as some of the worst-performing. Under Mayor Michael Bloomberg, the city embarked on a major school reform effort. New York City has many nationally important independent universities and colleges, such as Barnard College, Columbia University, Cooper Union, Cornell Tech, Fordham University, Long Island University, Manhattan College, New York Institute of Technology, New York University, Pace University, Pratt Institute, St. John's University, The New School, Vaughn College of Aeronautics and Technology, and Yeshiva University. The city has dozens of other private colleges and universities, including many religious and special-purpose institutions, such as St. Francis College, The Juilliard School and The School of Visual Arts. 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. The New York Public Library, which has the largest collection of any public library system in the country, serves Manhattan, the Bronx, and Staten Island. It has several research libraries including the Main Branch and the Schomburg Center for Research in Black Culture. Queens is served by the Queens Borough Public Library, the nation's second largest public library system, while Brooklyn Public Library serves Brooklyn. New York