T.A. or Not T.A.

Coach Gerber takes over as math teacher, but he needs T.J.'s help as a teacher's assistant. Marcus is pressured by Floyd to pull up his slumping grades, and he resorts to even trying to get T.J. to do his homework assignment. When Marcus, who doesn't think he needs to study because he wants to make it big as a musician -- ends up passing his test, he and Floyd have a chat about Marcus' academic future. Meanwhile, Yvette meets a guy named Calvin and is shocked to discover is actually 15-years-old and a sophomore. When she makes a speech to the entire school cafeteria, that she is no longer ashamed that she is going out with him, Calvin drops a bomb and tells Yvette that he is now seeing a sophomore -- who attends Howard University.