With the Carolina Panthers facing off against the Denver Broncos in Superbowl 50, football is on our minds this week. And for many of the millions of fans who tune in every Sunday to watch their favorite teams compete, football is little more than a weekly ritual. For English professor Mark Edmundson, the football field is a staging ground for some of life's most important lessons. In his book "Why Football Matters," Edmundson looks back to his own high school years playing the sport and reflects on how it taught him courage, resilience, determination, and other values he'd draw on as an adult.