Humor is an excellent teaching tool because, in addition to preventing classroom boredom and monotony, it introduces lateral aspects of language such as irony, sarcasm, mockery, elision, ellipsis, and euphemism. Humor in language can be approached interactively or structurally through a variety of activities. It can be used to expand vocabulary, encourage discussion, examine meaningless words and expressions, introduce double-sense words and expressions, investigate ways of expressing ideas and their implicit intentions, develop syntax and grammar, provide cultural information, and teach phonetics. Cartoons (provided by the teacher or produced by the students), jokes, headlines, advertising, quotations with mistakes, and even classroom humor provide opportunities for language learning. Teachers can file these materials in a variety of ways to maximize their usefulness. (MSE)