Chicago Public Schools, commonly abbreviated as CPS by local residents and politicians and officially classified as City of Chicago School District #299 for funding and districting reasons, is a large school district

School district

School districts are a form of special-purpose district which serves to operate the local public primary and secondary schools.-United States:...

 that manages over 600 public elementary and high schools in Chicago, Illinois. Chicago Public Schools is currently the third largest school district in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, with more than 400,000 students enrolled in the school district.