Too Cool for School
No language teacher would ever be advised to do this and very few would believe that it would be a cool idea. This teacher probably was new to his job and was nervous that the students would think he’s weird. He wanted to fit in and show them that he was cool.
However, he chose the worst way to do so! He would teach his students to swear words in Spanish which he used as extra credit if they not only remembered them but could form a sentence using them. This is ironic since most students would probably get sent to the principal’s office for swearing in class.