The School District of Philadelphia (SDP) is the school district that includes all public schools in Philadelphia. Established in 1818, it is the eighth largest school district in the nation. The School Board was created in 1850 to oversee the schools of Philadelphia. The Act of Assembly of April 5, 1867, designated that the Controllers of the Public Schools of Philadelphia were to be appointed by the judges of the Court of Common Pleas. There was one Controller to be appointed from each ward.