Radford Racing School and Formula 4 United States Championship (F4 U.S.) will once again host the Radford Racing School F4 U.S. “Karts to Cars” Scholarship School, a joint venture that brings together some of the best karters from around North America to get their first experience in a single-seater racecar. The two-day school will take place December 5-6 at Radford Racing School’s multi-track facility in Chandler, Ariz.