Durham School Services is a full-service student transportation company that that has been serving the needs of schools and organization since 1917. The company provides services that include home-to-school, special needs, and field trip transportation, as well as summer and charter trips for districts and organizations throughout the United States. It operates more than 12,000 school buses and serves over 300 school districts in nearly 25 U.S. states. Durham School Services administers various instructive sessions related to proper entry and exit of the bus, emergency evacuation techniques and general school bus safety for students in kindergarten through grade three. The company also organizes several preventive maintenance programs. It works in partnerships with National Express Corporation, National Express Group and Stock Transportation, as well as the National School Transportation Association and the National Association of Pupil Transportation. Durham School Services maintains its corporate headquarters in Downers Grove, Ill.