Which episode of "Saved By The Bell" is this scene from?

All the kids are studying for a midterm and they imagine the teacher's face in their books, and also when they turn on the TV they imagine the teacher is dressed like the Fresh Prince of Bel Air and he is rapping, "F, F, F, You're all getting an F!" I would like either the title of the episode itself or some idea of what else went on in that episode so I might be able to figure it out. Thanks.