Complex sentence: Skip Barber started the school in 1975 with two borrowed Formula Ford race cars and four students and at one time trained more motorsports winners and champions than any other organization of its kind.
Split into simpler sentences: Skip Barber started the school in 1975 with two borrowed Formula Ford race cars and four students. Since its founding in 1975, Skip Barber Racing School has trained more motorsports winners and champions than any other organization of its kind.