 He last regularly attended school in the fifth grade at Steuart Hill elementary, though Bubbles tried to get him to go back at some point between the third and fourth seasons.As the fourth season starts, Bubbles is selling small items from a shopping cart to get by, and is trying to train Sherrod to run his own business.Sherrod's basic math skills prove to be extremely poor, and Bubbles insists that he return to school.