Immortal of all time in college football is Knute Rockne, late coach at Notre Dame, who produced many intercollegiate champions, best of which was the 1924 "Four horsemen and seven mules." A superb teacher and student of human nature, Rockne developed more college coaches than any man in the history of football. Nearly 100 Notre Dame men are now coaching college and school teams. Rockne's secret was close attention to little details, from a unique style of line play in which such oddities as the "forearm shiver," the "sliding line" etc. were features, to high backfield speed in which the carriers moved like well drilled soldiers.