Even though there were many developments to this field prior to this point, the most important did not come until the time of Coleman Griffith. Griffith was a professor at the University of Illinois. He is considered to be the father of sports psychology in North America. Griffith's first contribution was that he started a section in his introductory to psychology class that only athletes could take. Then in 1921, he gave the first public talk about psychology and athletics. In 1923, he started a special course focusing on psychology and sports. It was called Psychology and Athletics. The textbook that was used for this class was Griffith’s third book, called Psychology of Coaching. Later in 1924, Griffith began meeting with Knute Rockne, who was a football coach at Notre Dame. He met with Rockne to explore how coaching was affected by psychology.