Tucson (movie, 1949)

Jimmy Lydon plays Andy Bryant, a University of Arizona student whose grades suffer because of his preoccupation with an upcoming intercollegiate rodeo. Andy's father (Joe Sawyer) is more interested in embarrassing a rival at the rodeo than he is with his son's academic progress. When his lack of focus nearly causes a tragic accident in the university chemistry lab, Andy decides to hunker down and study.