The institution covers an area of roughly and provides for a broad variety of different courses. The University of Nevada, Las Vegas is planning to open a branch in North Las Vegas near the I-215 Beltway. Primary and secondary school students in North Las Vegas are served by the Clark County School District (CCSD), the fifth-largest in the United States with over 300,000 students enrolled in any of its 357 schools. CCSD has a workforce of over 35,000 people, and is considered a major employer in the county. The following high schools are in North Las Vegas:   Domestic and international airline travel for the entire metropolitan area is handled at McCarran International Airport, south of Las Vegas, adjacent to the Las Vegas Strip. The North Las Vegas Airport, formerly known as "Sky Haven Airport", was established on December 7, 1941. A division of Vision Airlines operates tours to the Grand Canyon in Arizona from the airport. RTC Transit provides bus service in the city, as it does throughout the Las Vegas metropolitan area. The major highways/roads serving North Las Vegas are Interstate 15, Clark County Route 215, U.S. Route 93, Las Vegas Boulevard (SR 604) and Rancho Drive (SR 599 / US 95 Bus.)